move the ai gateway to its own server

server/aiGatewayServer.ts

@@ -0,0 +1,39 @@
+import express from "express";
+import helmet from "helmet";
+import cors from "cors";
+import config from "@server/lib/config";
+import logger from "@server/logger";
+import {
+    errorHandlerMiddleware,
+    notFoundMiddleware
+} from "@server/middlewares";
+import * as aiGateway from "@server/routers/aiGateway";
+
+const aiGatewayPort = config.getRawConfig().server.ai_gateway_port;
+
+export function createAiGatewayServer() {
+    const aiGatewayServer = express();
+
+    const trustProxy = config.getRawConfig().server.trust_proxy;
+    if (trustProxy) {
+        aiGatewayServer.set("trust proxy", trustProxy);
+    }
+
+    aiGatewayServer.use(helmet());
+    aiGatewayServer.use(cors());
+    aiGatewayServer.use(express.json());
+
+    aiGatewayServer.post("/chat/completions", aiGateway.chatCompletions);
+
+    aiGatewayServer.use(notFoundMiddleware);
+    aiGatewayServer.use(errorHandlerMiddleware);
+
+    aiGatewayServer.listen(aiGatewayPort, (err?: any) => {
+        if (err) throw err;
+        logger.info(
+            `AI gateway server is running on http://localhost:${aiGatewayPort}`
+        );
+    });
+
+    return aiGatewayServer;
+}