use port variable

worker/orca-agent/main.py

@@ -1,6 +1,8 @@
 from src.server import create_app
+import os
 
 app = create_app()
 
 if __name__ == "__main__":
-    app.run(host="0.0.0.0", port=8080, debug=True)
+    port = int(os.environ.get("PORT", 8080))
+    app.run(host="0.0.0.0", port=port, debug=True)