Fix gunicorn start command for Render deployment

render.yaml

@@ -3,9 +3,7 @@ services:
     name: bruno-license-server
     env: python
     buildCommand: pip install -r requirements.txt
-    startCommand: gunicorn server:app
+    startCommand: gunicorn --bind 0.0.0.0:$PORT server:app
     envVars:
-      - key: FLASK_HOST
-        value: 0.0.0.0
-      - key: FLASK_PORT
-        value: 10000
+      - key: PYTHON_VERSION
+        value: 3.11.0