feat: Update endpoint server-time

app/api/endpoints/server-time.py

@@ -0,0 +1,12 @@
+from datetime import datetime
+from fastapi import APIRouter, Response
+
+router = APIRouter()
+
+@router.post("/server-time", status_code=200)
+async def get_server_time():
+    """
+    Get the current server time
+    """
+    now = datetime.utcnow()
+    return Response(content=f"Server time: {now.isoformat()}", media_type="text/plain")