Readme update and fix. Ignore build

Author: ChristianOellers

.gitignore

@@ -5,7 +5,7 @@
 /public/api/config/access.php
 
 # Compiled output
-# /build
+/build
 /dist
 /documentation
 /out-tsc

README.md

@@ -2,13 +2,23 @@
 
 TOC
 
+- [About](#about)
 - [Use](#use)
 - [Documentation](#documentation)
 - [Testing](#testing)
 - [Issues](#issues)
 
 ---
 
+## About
+
+This proof-of-concept app is created for a friend to use as aid when selling decorative products on markets. The application is run on a smartphone and can track sales and incomes per day, instead of having to manually note these.
+
+> This is the tech and skill demo version withour real application data like products.
+> Early, conceptual MVP phase with some features to be refined and finished on demand.
+
+---
+
 ## Use
 
 ### Install
@@ -30,8 +40,9 @@ npm install
 ### PHP + Database
 
 - Install a PHP server and database that can run the API's PHP code
-  - Adjust credentials under `public/api/config`
-  - Initialize the database with SQL from `_internals/SQL/*.sql`
+  - Copy credentials template from `_internals`
+  - Adjust path to credentials under `public/api/index`
+  - Initialize the database with SQL from `_internals/sql/*.sql`
 - Run the build and upload the `build` folder
   - Build contains the API that needs PHP and SQL to run