Fix server entrypoint for OpenEnv validation

pyproject.toml

@@ -13,7 +13,7 @@ dependencies = [
 ]
 
 [project.scripts]
-server = "server.app:app"
+server = "server.app:main"
 
 [build-system]
 requires = ["setuptools"]

server/app.py

@@ -1,5 +1,6 @@
 from fastapi import FastAPI
 import json
+import uvicorn
 
 from env.feed_env import FeedRankingEnv
 from agents.random_agent import RandomAgent
@@ -12,15 +13,18 @@ with open("data/posts.json", "r") as f:
 env = FeedRankingEnv(posts, task="hard")
 agent = RandomAgent()
 
+
 @app.get("/")
 def root():
     return {"message": "OpenEnv server running"}
 
+
 @app.post("/reset")
 def reset():
     state = env.reset()
     return {"state": state.__dict__}
 
+
 @app.post("/step")
 def step():
     action = agent.act(env.state(), env.posts)
@@ -30,4 +34,14 @@ def step():
         "state": state.__dict__,
         "reward": reward,
         "done": done
-    }
+    }
+
+
+# 🔥 REQUIRED MAIN FUNCTION
+def main():
+    uvicorn.run("server.app:app", host="0.0.0.0", port=7860)
+
+
+# 🔥 REQUIRED ENTRY POINT
+if __name__ == "__main__":
+    main()