update readme.md

readme.md

@@ -15,6 +15,34 @@ Multiplayer space-themed game built with React, Socket.io.
 
 To automatically install all dependencies in the correct sub-projects (`api`, `game-server`, `client`) at once, run:
 
+### 1. API Server (api/.env)
+
+```env
+MONGODB_URI=mongodb://localhost:27017
+PORT=PORT
+GAME_SERVER_SECRET=game_server_pass_123
+JWT_SECRET=secret_123
+```
+
+### 2. GameServer (game-server/.env)
+
+```env
+PORT=5003
+API_SERVER_URL=http://localhost:3000/api
+SERVER_NAME=Alpha-Centauri-3
+SERVER_SECRET=game_server_pass_123
+JWT_SECRET=secret_123
+DESCRIPTION="Welcome to Alpha-Centauri-3, a high-tech frontier station drifting on the edge of the known galaxy."
+REGION=UK
+channel_binding=require
+```
+
+### 3. Client (client/.env)
+
+```env
+VITE_API_URL=http://localhost:3000/api
+```
+
 ```bash
 npm run install-all
 npm run dev