fix: commands to run from within the .medusa/server directory (#9941)

www/apps/resources/app/deployment/medusa-application/railway/page.mdx

@@ -47,7 +47,7 @@ So, add the following configuration in `medusa-config.ts`:
 module.exports = defineConfig({
   projectConfig: {
     // ...
-    workerMode: process.env.MEDUSA_WORKER_MODE,
+    workerMode: process.env.MEDUSA_WORKER_MODE as "shared" | "worker" | "server",
   },
 })
 ```
@@ -219,7 +219,7 @@ ADMIN_CORS= # ADMIN URL
 AUTH_CORS= # STOREFRONT AND ADMIN URLS, SEPARATED BY COMMAS
 # change to false if you're hosting the admin with the application
 DISABLE_MEDUSA_ADMIN=true
-MEDUSA_WORKER_MODE=worker
+MEDUSA_WORKER_MODE=server
 PORT=9000
 DATABASE_URL=${{Postgres.DATABASE_PUBLIC_URL}}
 REDIS_URL=${{Redis.REDIS_PUBLIC_URL}}
@@ -245,7 +245,7 @@ To set the `start` command of your Medusa application in server mode:
 4. For the “Custom Start Command” field, enter the following and click the check mark button:
 
 ```bash npm2yarn
-npm run predeploy && npm run start
+cd .medusa/server && npm run predeploy && npm run start
 ```
 
 ### Deploy Changes
@@ -286,7 +286,7 @@ In Railway, add / modify the following environment variables for the Medusa appl
 ```bash
 ADMIN_CORS= # MEDUSA APPLICATION URL
 AUTH_CORS= # ADD MEDUSA APPLICATION URL
-MEDUSA_BACKEND_URL= # MEDUSA APPLICATION URL
+MEDUSA_BACKEND_URL=https://${{RAILWAY_PUBLIC_DOMAIN}}
 ```
 
 Where you set the value of `ADMIN_CORS` and `MEDUSA_BACKEND_URL` to the Medusa application’s URL you got from the previous step, and you add the URL to `AUTH_CORS`.
@@ -350,7 +350,7 @@ To set the `start` command of your Medusa application in worker mode:
 4. For the “Custom Start Command” field, enter the following and click the check mark button:
 
 ```bash npm2yarn
-npm run start
+cd .medusa/server && npm run start
 ```
 
 ### Deploy Changes