Better docs in default .env

.env.dev

@@ -1,12 +1,18 @@
 
-# Example ".env" for development, just copy this file to ".env" and edit that one
+# Backend server mode, when in production this also serves static files from the current dist/ folder.
 MODE=development
 
-# Development server host
+# Backend server host address
+# In "development" mode the default port for the backend server is :4000
 HOST=:4000
 
-# Development server url
+# Frontend address
+# In development mode the default port for the ViteJS frontend dev-server is :4000
 URL=http://localhost:3000
 
-EMAIL=mail@example.org
+# Email for support
+EMAIL=macchinisti.phc@gmail.com
 
+# ViteJS BASE_URL if not served on root, default is "/"
+# This is used on all frontend link urls
+BASE_URL=/