fix: revert no server start (#6790)

**Why**
- we want to start a server so we can allow health checks on workers

packages/medusa/src/commands/start.js

@@ -24,47 +24,40 @@ export default async function ({ port, directory }) {
         expressApp: app,
       })
 
-      const shouldStartServer =
-        configModule.projectConfig.worker_mode !== "worker"
-
       let server
-      if (shouldStartServer) {
-        const serverActivity = Logger.activity(`Creating server`)
-        server = GracefulShutdownServer.create(
-          app.listen(port, (err) => {
-            if (err) {
-              return
-            }
-            Logger.success(serverActivity, `Server is ready on port: ${port}`)
-            track("CLI_START_COMPLETED")
+      const serverActivity = Logger.activity(`Creating server`)
+      server = GracefulShutdownServer.create(
+        app.listen(port, (err) => {
+          if (err) {
+            return
+          }
+          Logger.success(serverActivity, `Server is ready on port: ${port}`)
+          track("CLI_START_COMPLETED")
+        })
+      )
+
+      // Handle graceful shutdown
+      const gracefulShutDown = () => {
+        server
+          .shutdown()
+          .then(() => {
+            Logger.info("Gracefully stopping the server.")
+            process.exit(0)
+          })
+          .catch((e) => {
+            Logger.error("Error received when shutting down the server.", e)
+            process.exit(1)
           })
-        )
-
-        // Handle graceful shutdown
-        const gracefulShutDown = () => {
-          server
-            .shutdown()
-            .then(() => {
-              Logger.info("Gracefully stopping the server.")
-              process.exit(0)
-            })
-            .catch((e) => {
-              Logger.error("Error received when shutting down the server.", e)
-              process.exit(1)
-            })
-        }
-
-        process.on("SIGTERM", gracefulShutDown)
-        process.on("SIGINT", gracefulShutDown)
-      } else {
-        Logger.info("Running in worker mode, server will not be started.")
       }
 
+      process.on("SIGTERM", gracefulShutDown)
+      process.on("SIGINT", gracefulShutDown)
+
       scheduleJob(CRON_SCHEDULE, () => {
         track("PING")
       })
 
-      return shouldStartServer ? { dbConnection, server } : { dbConnection }
+      return { dbConnection, server }
     } catch (err) {
       Logger.error("Error starting server", err)
       process.exit(1)