Add port availability checking to avoid port conflicts

main.py

@@ -1,4 +1,6 @@
 import os
+import socket
+import sys
 
 import uvicorn
 from fastapi import FastAPI
@@ -33,10 +35,31 @@ app.include_router(health_router.router, prefix="/api", tags=["health"])
 async def startup():
     create_tables()
 
+def is_port_in_use(port, host='0.0.0.0'):
+    """Check if a port is in use."""
+    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
+        try:
+            s.bind((host, port))
+            return False
+        except OSError:
+            return True
+
 if __name__ == "__main__":
-    # Get port from environment variable or use default of 8002
-    # This avoids the conflict with port 8001 which is already in use
-    port = int(os.environ.get("PORT", 8002))
+    # Get port from environment variable or use default of 8000
+    port = int(os.environ.get("PORT", 8000))
     host = os.environ.get("HOST", "0.0.0.0")
 
+    # If the preferred port is in use, try to find an available port
+    if is_port_in_use(port, host):
+        print(f"Port {port} is already in use. Trying alternative ports...")
+        for alt_port in [8001, 8002, 8003, 8004, 8005]:
+            if not is_port_in_use(alt_port, host):
+                port = alt_port
+                print(f"Found available port: {port}")
+                break
+        else:
+            print("No available ports found between 8000-8005. Exiting.")
+            sys.exit(1)
+
+    print(f"Starting server on {host}:{port}")
     uvicorn.run("main:app", host=host, port=port, reload=True)