Update FastAPI application with proper CORS and port settings

Author: getGit789

application.py

@@ -1,23 +1,32 @@
 from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
 from mangum import Mangum
 from backend.app.main import app
 
 # Update the application instance name to match the EB configuration
 application = app
 
-# Add CORS middleware
-from fastapi.middleware.cors import CORSMiddleware
+# Add CORS middleware with specific origins
+origins = [
+    "https://getgit789.github.io",
+    "https://getgit789.github.io/python-interpreter-online/",
+    "http://localhost:5000",
+    "http://127.0.0.1:5000"
+]
+
 application.add_middleware(
     CORSMiddleware,
-    allow_origins=["*"],  # Temporarily allow all origins for testing
+    allow_origins=origins,
     allow_credentials=True,
     allow_methods=["*"],
     allow_headers=["*"],
+    expose_headers=["*"],
+    max_age=3600
 )
 
 # Create handler for AWS Lambda
 handler = Mangum(application)
 
 if __name__ == "__main__":
     import uvicorn
-    uvicorn.run(application, host="0.0.0.0", port=5000)
+    uvicorn.run(application, host="0.0.0.0", port=80)