updates genIndex.js to limit the readme depth to 3

Author: ishtms

Readme.md

@@ -57,7 +57,6 @@ The repo for our backend framework- [Velocy](https://github.com/ishtms/velocy).
     - [Verdict - Typical benchmark](chapters/ch00-nodejs-faster-than-you-think.md#verdict-typical-benchmark)
   - [The real benchmark](chapters/ch00-nodejs-faster-than-you-think.md#the-real-benchmark)
     - [Updating our code](chapters/ch00-nodejs-faster-than-you-think.md#updating-our-code)
-      - [Axum](chapters/ch00-nodejs-faster-than-you-think.md#axum)
     - [Elysia](chapters/ch00-nodejs-faster-than-you-think.md#elysia)
     - [Express](chapters/ch00-nodejs-faster-than-you-think.md#express)
   - [Velocy](chapters/ch00-nodejs-faster-than-you-think.md#velocy)
@@ -80,15 +79,7 @@ The repo for our backend framework- [Velocy](https://github.com/ishtms/velocy).
     - [4. Transmission Overhead](chapters/ch01-what-is-a-web-server-anyway.md#4-transmission-overhead)
   - [Asking and Getting: How Web Servers Respond to Your Requests](chapters/ch01-what-is-a-web-server-anyway.md#asking-and-getting-how-web-servers-respond-to-your-requests)
     - [The Request:](chapters/ch01-what-is-a-web-server-anyway.md#the-request-)
-      - [Your Request:](chapters/ch01-what-is-a-web-server-anyway.md#your-request-)
-      - [Finding the Address:](chapters/ch01-what-is-a-web-server-anyway.md#finding-the-address-)
-      - [Resolving the Address:](chapters/ch01-what-is-a-web-server-anyway.md#resolving-the-address-)
     - [The Response:](chapters/ch01-what-is-a-web-server-anyway.md#the-response-)
-      - [Return Address:](chapters/ch01-what-is-a-web-server-anyway.md#return-address-)
-      - [Sending the Request:](chapters/ch01-what-is-a-web-server-anyway.md#sending-the-request-)
-      - [Preparing the Content:](chapters/ch01-what-is-a-web-server-anyway.md#preparing-the-content-)
-      - [Sending the Response:](chapters/ch01-what-is-a-web-server-anyway.md#sending-the-response-)
-      - [Enjoying the Content:](chapters/ch01-what-is-a-web-server-anyway.md#enjoying-the-content-)
 - [Your first `node.js` program](chapters/ch02-your-first-nodejs-program.md#your-first-node-js-program)
   - [What exactly is node or nodejs?](chapters/ch02-your-first-nodejs-program.md#what-exactly-is-node-or-nodejs-)
   - [Your first node.js program](chapters/ch02-your-first-nodejs-program.md#your-first-node-js-program)
@@ -132,7 +123,6 @@ The repo for our backend framework- [Velocy](https://github.com/ishtms/velocy).
   - [Refactoring the code](chapters/ch04.1-refactoring-the-code.md#refactoring-the-code)
     - [**The Need for Refactoring**](chapters/ch04.1-refactoring-the-code.md#-the-need-for-refactoring-)
     - [**Creating Separate Files**](chapters/ch04.1-refactoring-the-code.md#-creating-separate-files-)
-      - [Explanation](chapters/ch04.1-refactoring-the-code.md#explanation)
     - [The `index.js` file](chapters/ch04.1-refactoring-the-code.md#the-index-js-file)
     - [The `lib/logtar.js` file](chapters/ch04.1-refactoring-the-code.md#the-lib-logtar-js-file)
     - [The `lib/logger.js` file](chapters/ch04.1-refactoring-the-code.md#the-lib-logger-js-file)
@@ -151,11 +141,8 @@ The repo for our backend framework- [Velocy](https://github.com/ishtms/velocy).
     - [The `log` method](chapters/ch04.2-writing-logs.md#the-log-method)
     - [Considering the `log_level` member variable](chapters/ch04.2-writing-logs.md#considering-the-log_level-member-variable)
     - [Writing to a file](chapters/ch04.2-writing-logs.md#writing-to-a-file)
-      - [A small primer on Regular Expressions](chapters/ch04.2-writing-logs.md#a-small-primer-on-regular-expressions)
-      - [Testing the log file creation](chapters/ch04.2-writing-logs.md#testing-the-log-file-creation)
     - [Another gotcha](chapters/ch04.2-writing-logs.md#another-gotcha)
     - [Logs directory configuration](chapters/ch04.2-writing-logs.md#logs-directory-configuration)
-      - [Our first script](chapters/ch04.2-writing-logs.md#our-first-script)
     - [The `require` object](chapters/ch04.2-writing-logs.md#the-require-object)
     - [Adding a new helper to create log directory](chapters/ch04.2-writing-logs.md#adding-a-new-helper-to-create-log-directory)
     - [Updating the `init` method](chapters/ch04.2-writing-logs.md#updating-the-init-method)
@@ -176,14 +163,11 @@ The repo for our backend framework- [Velocy](https://github.com/ishtms/velocy).
     - [Concurrency](chapters/ch04.4-intro-to-async-vs-sync.md#concurrency)
   - [Adding Rolling File Support](chapters/ch04.5-rolling-file-support.md#adding-rolling-file-support)
     - [Rolling features](chapters/ch04.5-rolling-file-support.md#rolling-features)
-      - [`#time_threshold`](chapters/ch04.5-rolling-file-support.md#-time_threshold-)
-      - [`#size_threshold`](chapters/ch04.5-rolling-file-support.md#-size_threshold-)
     - [The `rolling_check()` method](chapters/ch04.5-rolling-file-support.md#the-rolling_check-method)
     - [`file_handle.stat()`](chapters/ch04.5-rolling-file-support.md#-file_handle-stat-)
     - [Calling the `rolling_check` method](chapters/ch04.5-rolling-file-support.md#calling-the-rolling_check-method)
     - [A big gotcha!](chapters/ch04.5-rolling-file-support.md#a-big-gotcha-)
   - [Stack traces across `await` points](chapters/ch04.5-rolling-file-support.md#stack-traces-across-await-points)
-      - [The culprit](chapters/ch04.5-rolling-file-support.md#the-culprit)
     - [Testing the new Log file creation](chapters/ch04.5-rolling-file-support.md#testing-the-new-log-file-creation)
 - [HTTP Deep dive](chapters/ch05.0-http-deep-dive.md#http-deep-dive)
   - [A small web server](chapters/ch05.0-http-deep-dive.md#a-small-web-server)
@@ -201,34 +185,16 @@ The repo for our backend framework- [Velocy](https://github.com/ishtms/velocy).
     - [The `/` path](chapters/ch05.1-http-verbs-versioning-http1_1.md#the-path)
     - [`HTTP/0.9`](chapters/ch05.1-http-verbs-versioning-http1_1.md#-http-0-9-)
     - [`HTTP/1.0`](chapters/ch05.1-http-verbs-versioning-http1_1.md#-http-1-0-)
-      - [Introduction of the HTTP Header](chapters/ch05.1-http-verbs-versioning-http1_1.md#introduction-of-the-http-header)
-      - [Versioning](chapters/ch05.1-http-verbs-versioning-http1_1.md#versioning)
-      - [Status Codes](chapters/ch05.1-http-verbs-versioning-http1_1.md#status-codes)
-      - [Content-Type Header](chapters/ch05.1-http-verbs-versioning-http1_1.md#content-type-header)
-      - [New Methods](chapters/ch05.1-http-verbs-versioning-http1_1.md#new-methods)
     - [`HTTP/1.1`](chapters/ch05.1-http-verbs-versioning-http1_1.md#-http-1-1-)
-      - [Persistent Connections](chapters/ch05.1-http-verbs-versioning-http1_1.md#persistent-connections)
-      - [Pipelining](chapters/ch05.1-http-verbs-versioning-http1_1.md#pipelining)
-      - [Chunked Transfer Encoding](chapters/ch05.1-http-verbs-versioning-http1_1.md#chunked-transfer-encoding)
-      - [The `Host` header](chapters/ch05.1-http-verbs-versioning-http1_1.md#the-host-header)
-      - [Caching improvements](chapters/ch05.1-http-verbs-versioning-http1_1.md#caching-improvements)
-      - [Range Requests](chapters/ch05.1-http-verbs-versioning-http1_1.md#range-requests)
-      - [New Methods: `PUT`, `DELETE`, `CONNECT`, `OPTIONS`, `TRACE`](chapters/ch05.1-http-verbs-versioning-http1_1.md#new-methods-put-delete-connect-options-trace-)
   - [User agents](chapters/ch05.2-user-agents.md#user-agents)
     - [`User-Agent` can be weird](chapters/ch05.2-user-agents.md#-user-agent-can-be-weird)
   - [MIME Type and `Content-Type`](chapters/ch05.3-mime-type-and-content-type.md#mime-type-and-content-type-)
     - [Understanding the `Accept` Header](chapters/ch05.3-mime-type-and-content-type.md#understanding-the-accept-header)
-      - [Breaking Down the Line](chapters/ch05.3-mime-type-and-content-type.md#breaking-down-the-line)
-      - [Why the Wildcard?](chapters/ch05.3-mime-type-and-content-type.md#why-the-wildcard-)
-      - [Server Response](chapters/ch05.3-mime-type-and-content-type.md#server-response)
     - [Mime Type](chapters/ch05.3-mime-type-and-content-type.md#mime-type)
     - [Anatomy of a MIME type](chapters/ch05.3-mime-type-and-content-type.md#anatomy-of-a-mime-type)
     - [But why the wildcard `*/*`?](chapters/ch05.3-mime-type-and-content-type.md#but-why-the-wildcard-)
     - [The `Content-Type` header](chapters/ch05.3-mime-type-and-content-type.md#the-content-type-header)
-      - [`Content-Type` on request header](chapters/ch05.3-mime-type-and-content-type.md#-content-type-on-request-header)
-      - [`Content-Type` on response header](chapters/ch05.3-mime-type-and-content-type.md#-content-type-on-response-header)
     - [The `charset=UTF-8`: character encoding](chapters/ch05.3-mime-type-and-content-type.md#the-charset-utf-8-character-encoding)
-      - [Universal Character Encoding](chapters/ch05.3-mime-type-and-content-type.md#universal-character-encoding)
   - [Headers](chapters/ch05.4-headers.md#headers)
     - [Header Name](chapters/ch05.4-headers.md#header-name)
     - [Colon (`:`)](chapters/ch05.4-headers.md#colon-)
@@ -245,11 +211,6 @@ The repo for our backend framework- [Velocy](https://github.com/ishtms/velocy).
   - [Response Headers](chapters/ch05.4-headers.md#response-headers)
     - [Content-Type (response)](chapters/ch05.4-headers.md#content-type-response-)
     - [Cache-Control](chapters/ch05.4-headers.md#cache-control)
-      - [How Caches Work:](chapters/ch05.4-headers.md#how-caches-work-)
-      - [Cache-Control Directives:](chapters/ch05.4-headers.md#cache-control-directives-)
-        - [Always Cache (infrequent updates)](chapters/ch05.4-headers.md#always-cache-infrequent-updates-)
-        - [Always Cache (private only)](chapters/ch05.4-headers.md#always-cache-private-only-)
-        - [Never Cache (realtime data)](chapters/ch05.4-headers.md#never-cache-realtime-data-)
     - [Set-Cookie](chapters/ch05.4-headers.md#set-cookie)
   - [Response and Status Codes](chapters/ch05.5-response-status-codes.md#response-and-status-codes)
     - [`Connection: close` in action](chapters/ch05.5-response-status-codes.md#-connection-close-in-action)
@@ -261,10 +222,6 @@ The repo for our backend framework- [Velocy](https://github.com/ishtms/velocy).
     - [Routing and URL Handling:](chapters/ch06.00-velocy-our-backend-framework.md#routing-and-url-handling-)
     - [Middlewares](chapters/ch06.00-velocy-our-backend-framework.md#middlewares)
     - [Building our own database](chapters/ch06.00-velocy-our-backend-framework.md#building-our-own-database)
-      - [Data Storage and Retrieval:](chapters/ch06.00-velocy-our-backend-framework.md#data-storage-and-retrieval-)
-      - [Indexing:](chapters/ch06.00-velocy-our-backend-framework.md#indexing-)
-      - [CRUD Operations:](chapters/ch06.00-velocy-our-backend-framework.md#crud-operations-)
-      - [Querying:](chapters/ch06.00-velocy-our-backend-framework.md#querying-)
     - [Caching](chapters/ch06.00-velocy-our-backend-framework.md#caching)
     - [Rate limiting](chapters/ch06.00-velocy-our-backend-framework.md#rate-limiting)
     - [Some other features that we will be implementing](chapters/ch06.00-velocy-our-backend-framework.md#some-other-features-that-we-will-be-implementing)
@@ -274,12 +231,9 @@ The repo for our backend framework- [Velocy](https://github.com/ishtms/velocy).
     - [Chunks, oh no!](chapters/ch06.01-basic-router-implementation.md#chunks-oh-no-)
     - [Specifying `Content-Length`](chapters/ch06.01-basic-router-implementation.md#specifying-content-length-)
     - [Code reusability](chapters/ch06.01-basic-router-implementation.md#code-reusability)
-      - [Separation of Concerns](chapters/ch06.01-basic-router-implementation.md#separation-of-concerns)
   - [The `Router` class](chapters/ch06.02-the-router-class.md#the-router-class)
     - [Using `Router` with an HTTP server](chapters/ch06.02-the-router-class.md#using-router-with-an-http-server)
   - [`this` is not good](chapters/ch06.02-the-router-class.md#-this-is-not-good)
-      - [Using `.bind()`](chapters/ch06.02-the-router-class.md#using-bind-)
-      - [Using `Arrow` function](chapters/ch06.02-the-router-class.md#using-arrow-function)
     - [Lexical Context](chapters/ch06.02-the-router-class.md#lexical-context)
     - [Arrow functions are not free](chapters/ch06.02-the-router-class.md#arrow-functions-are-not-free)
     - [Why should we care about memory?](chapters/ch06.02-the-router-class.md#why-should-we-care-about-memory-)
@@ -291,29 +245,10 @@ The repo for our backend framework- [Velocy](https://github.com/ishtms/velocy).
     - [Root Node](chapters/ch06.05-ex-implementing-a-trie.md#root-node)
     - [End of the word](chapters/ch06.05-ex-implementing-a-trie.md#end-of-the-word)
     - [Challenge 1: Basic Trie with `insert` Method](chapters/ch06.05-ex-implementing-a-trie.md#challenge-1-basic-trie-with-insert-method)
-      - [Requirements](chapters/ch06.05-ex-implementing-a-trie.md#requirements)
-      - [More details](chapters/ch06.05-ex-implementing-a-trie.md#more-details)
-      - [Solution](chapters/ch06.05-ex-implementing-a-trie.md#solution)
-      - [Using a `for` loop instead of recursion](chapters/ch06.05-ex-implementing-a-trie.md#using-a-for-loop-instead-of-recursion)
     - [Challenge 2: Implement `search` method](chapters/ch06.05-ex-implementing-a-trie.md#challenge-2-implement-search-method)
-      - [Requirements](chapters/ch06.05-ex-implementing-a-trie.md#requirements)
-      - [More details](chapters/ch06.05-ex-implementing-a-trie.md#more-details)
-      - [Hints](chapters/ch06.05-ex-implementing-a-trie.md#hints)
-      - [Solution](chapters/ch06.05-ex-implementing-a-trie.md#solution)
   - [Exercise 2 - Implementing our Trie based `Router`](chapters/ch06.06-ex-implementing-router.md#exercise-2-implementing-our-trie-based-router-)
     - [Challenge 1: Implementing the `addRoute` method](chapters/ch06.06-ex-implementing-router.md#challenge-1-implementing-the-addroute-method)
-      - [Requirements](chapters/ch06.06-ex-implementing-router.md#requirements)
-      - [More details](chapters/ch06.06-ex-implementing-router.md#more-details)
-      - [Hints](chapters/ch06.06-ex-implementing-router.md#hints)
-      - [Solution](chapters/ch06.06-ex-implementing-router.md#solution)
-      - [Explanation](chapters/ch06.06-ex-implementing-router.md#explanation)
     - [Challenge 2: Implementing the `findRoute` method](chapters/ch06.06-ex-implementing-router.md#challenge-2-implementing-the-findroute-method)
-      - [Requirements](chapters/ch06.06-ex-implementing-router.md#requirements)
-      - [More details](chapters/ch06.06-ex-implementing-router.md#more-details)
-      - [Starting Boilerplate](chapters/ch06.06-ex-implementing-router.md#starting-boilerplate)
-      - [Hints](chapters/ch06.06-ex-implementing-router.md#hints)
-      - [Solution](chapters/ch06.06-ex-implementing-router.md#solution)
-      - [Explanation](chapters/ch06.06-ex-implementing-router.md#explanation)
   - [Exercise 3 - Adding `HTTP` method support](chapters/ch06.07-ex-adding-http-methods.md#exercise-3-adding-http-method-support)
     - [Requirements](chapters/ch06.07-ex-adding-http-methods.md#requirements)
     - [More details](chapters/ch06.07-ex-adding-http-methods.md#more-details)
@@ -322,20 +257,10 @@ The repo for our backend framework- [Velocy](https://github.com/ishtms/velocy).
     - [Solution](chapters/ch06.07-ex-adding-http-methods.md#solution)
   - [Adding HTTP methods to the Router](chapters/ch06.08-adding-verbs-api.md#adding-http-methods-to-the-router)
     - [Update the `TrieRouter` class](chapters/ch06.08-adding-verbs-api.md#update-the-trierouter-class)
-      - [Explanation](chapters/ch06.08-adding-verbs-api.md#explanation)
   - [Exercise 4 - Implementing Dynamic Routing](chapters/ch06.09-ex-dynamic-routing.md#exercise-4-implementing-dynamic-routing)
     - [Why Dynamic Routing?](chapters/ch06.09-ex-dynamic-routing.md#why-dynamic-routing-)
-      - [Flexibility](chapters/ch06.09-ex-dynamic-routing.md#flexibility)
-      - [Better User Experience](chapters/ch06.09-ex-dynamic-routing.md#better-user-experience)
-      - [Better Developer Experience](chapters/ch06.09-ex-dynamic-routing.md#better-developer-experience)
-      - [Better SEO](chapters/ch06.09-ex-dynamic-routing.md#better-seo)
     - [Anatomy of a dynamic route](chapters/ch06.09-ex-dynamic-routing.md#anatomy-of-a-dynamic-route)
     - [Challenge: Enhance the `TrieRouter` Class to Support Dynamic Routing](chapters/ch06.09-ex-dynamic-routing.md#challenge-enhance-the-trierouter-class-to-support-dynamic-routing)
-      - [Requirements](chapters/ch06.09-ex-dynamic-routing.md#requirements)
-      - [More Details](chapters/ch06.09-ex-dynamic-routing.md#more-details)
-      - [Solution](chapters/ch06.09-ex-dynamic-routing.md#solution)
-      - [Explanation](chapters/ch06.09-ex-dynamic-routing.md#explanation)
-      - [Testing the implementation](chapters/ch06.09-ex-dynamic-routing.md#testing-the-implementation)
     - [Summary](chapters/ch06.09-ex-dynamic-routing.md#summary)
   - [Running Our Server](chapters/ch06.10-running-our-server.md#running-our-server)
     - [Refactoring the `TrieRouter` class](chapters/ch06.10-running-our-server.md#refactoring-the-trierouter-class)

genIndex.js

@@ -41,7 +41,7 @@ async function extractHeadings(filePath) {
     }
 
     if (!insideCodeBlock) {
-      const match = line.match(/^(#{1,6})\s+(.*)/);
+      const match = line.match(/^(#{1,3})\s+(.*)/);
       if (match) {
         const level = match[1].length;
         const text = match[2];
@@ -64,4 +64,4 @@ function formatHeadings(headings, relativePath) {
   return formatted;
 }
 
-generateTOC().catch(console.error);
+generateTOC().catch((err) => console.error(err));