Populate env example with defaults

.env.example

@@ -1,19 +1,19 @@
 # Application
-APP_NAME=
+APP_NAME=BestChoice
 
 # Server
-SERVER_PORT=
-API_BASE_PATH=
-DATABASE_URL=
-URL_READER_API_KEY=
-# URL_READER_BASE_URL=https://r.jina.ai
+SERVER_PORT=3000
+API_BASE_PATH=/api
+DATABASE_URL=postgresql://user:pass@localhost:5432/db_name
+URL_READER_API_KEY=your_secret_key
+URL_READER_BASE_URL=https://r.jina.ai
 
-LLM_API_URL=
-LLM_API_KEY=
-LLM_MODEL=
+LLM_API_URL=https://xxx.yyy/chat/completions
+LLM_API_KEY=your_api_key
+LLM_MODEL=gpt-4o-mini
 
 # Client
-CLIENT_PORT=
-API_PROXY_TARGET=
-VITE_APP_NAME=
-VITE_API_BASE_URL=
+CLIENT_PORT=5173
+API_PROXY_TARGET=http://localhost:3000
+VITE_APP_NAME=BestChoice
+VITE_API_BASE_URL=/api