doc: add doc for R2

Author: SharzyL

README.md

@@ -26,15 +26,14 @@ This is a pastebin that can be deployed on Cloudflare workers. Try it on [shz.al
 ## Limitations
 
 1. If deployed on Cloudflare Worker free-tier plan, the service allows at most 100,000 reads and 1000 writes, 1000 deletes per day.
-2. Due to the size limit of Cloudflare KV storage, the size of each paste is bounded under 25 MB.
 
 ## Deploy
 
 You are free to deploy the pastebin on your own domain if you host your domain on Cloudflare.
 
 1. Install `node` and `yarn`.
 
-2. Create a KV namespace on Cloudflare workers dashboard, remember its ID.
+2. Create a KV namespace and R2 bucket on Cloudflare workers dashboard, remember its ID.
 
 3. Clone the repository and enter the directory.
 

src/handlers/handleWrite.ts

@@ -16,7 +16,6 @@ import {
 } from "../shared.js"
 
 function suggestUrl(short: string, baseUrl: string, filename?: string, contentAsString?: string) {
-  // TODO: should we suggest for URL redirect?
   if (filename) {
     return `${baseUrl}/${short}/${filename}`
   } else if (contentAsString && isLegalUrl(contentAsString)) {