list env variables

app/main.py

@@ -1,5 +1,7 @@
 from fastapi import FastAPI, WebSocket
 from fastapi.responses import HTMLResponse
+import os
+
 
 app = FastAPI()
 
@@ -43,6 +45,12 @@ html = """
 async def get():
     return HTMLResponse(html)
 
+@app.get("/env")
+async def env():
+    environment_variables = "<h3>Environment Variables</h3>"
+    for name, value in os.environ.items():
+        environment_variables += f"{name}: {value}<br>"
+    return HTMLResponse(environment_variables)
 
 @app.websocket("/ws")
 async def websocket_endpoint(websocket: WebSocket):