diff --git a/README.md b/README.md
index 3cbdf52..137c445 100644
--- a/README.md
+++ b/README.md
@@ -107,7 +107,7 @@ app.get('/', (req, res) => {
 app.listen(process.env.PORT || 8123);
 ```
 
-7. Update the `main` field in `package.json` with the filename of your app entry point: `"main": "app.js"`
+7. Update the `scripts` section in `package.json` with your app entry point command, under `start`: `"start": "node app.js"`
 8. Run `git add .`
 9. Run `git commit -m "Initial Commit"`
 10. Run `git push origin master`
diff --git a/src/helpers/docker.ts b/src/helpers/docker.ts
index d48fc71..6113729 100644
--- a/src/helpers/docker.ts
+++ b/src/helpers/docker.ts
@@ -66,7 +66,7 @@ const createContainer = async (
           ]
         }
       },
-      Cmd: ['node', '.']
+      Cmd: ['npm', 'run', 'start']
     })
     .then(container => container.id)
     .catch(err => err)