chore: add comments to headers, fix typo in docs

README.md

@@ -88,7 +88,7 @@ By default, server sends the following HTTP headers:
 -   Various CORS headers, allowing access from anywhere.
 -   Cache headers to cache responses for 604800 seconds (7 days).
 
-To change headers, edit `header` property in `src/config/app.ts`, then rebuild script.
+To change headers, edit `headers` property in `src/config/app.ts`, then rebuild script.
 
 ## Node vs PHP
 

src/config/app.ts

@@ -17,11 +17,13 @@ export const appConfig: AppConfig = {
 
 	// HTTP headers to send
 	headers: [
+		// CORS
 		'Access-Control-Allow-Origin: *',
 		'Access-Control-Allow-Methods: GET, OPTIONS',
 		'Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept, Accept-Encoding',
 		'Access-Control-Max-Age: 86400',
 		'Cross-Origin-Resource-Policy: cross-origin',
+		// Cache
 		'Cache-Control: public, max-age=604800, min-refresh=604800, immutable',
 	],