add llm service

.env.example

@@ -0,0 +1,19 @@
+# Application
+APP_NAME=
+
+# Server
+SERVER_PORT=
+API_BASE_PATH=
+DATABASE_URL=
+URL_READER_API_KEY=
+# URL_READER_BASE_URL=https://r.jina.ai
+
+LLM_API_URL=
+LLM_API_KEY=
+LLM_MODEL=
+
+# Client
+CLIENT_PORT=
+API_PROXY_TARGET=
+VITE_APP_NAME=
+VITE_API_BASE_URL=