chore: support worker/server only (#578)

Author: arcoraven

src/index.ts

@@ -1,11 +1,18 @@
 import "./polyfill";
 import { initServer } from "./server";
+import { env } from "./utils/env";
 import { logger } from "./utils/logger";
 import { initWorker } from "./worker";
 
 const main = async () => {
-  initServer();
-  initWorker();
+  if (env.ENGINE_MODE === "server_only") {
+    initServer();
+  } else if (env.ENGINE_MODE === "worker_only") {
+    initWorker();
+  } else {
+    initServer();
+    initWorker();
+  }
 };
 
 main();

src/utils/env.ts

@@ -79,7 +79,9 @@ export const env = createEnv({
       .nonnegative()
       .default(0),
     REDIS_URL: z.string(),
-    ENGINE_MODE: z.enum(["sandbox", "unrestricted"]).default("unrestricted"),
+    ENGINE_MODE: z
+      .enum(["default", "sandbox", "server_only", "worker_only"])
+      .default("default"),
   },
   clientPrefix: "NEVER_USED",
   client: {},