[BUG] .env.example missing NEXT_PUBLIC_APP_URL causes workflow execution error in manual setup #481

Describe the bug
.env.example is missing the following required variable:

NEXT_PUBLIC_APP_URL=http://localhost:3000/

Due to this, running any workflow via Manual Setup (Option 4) leads to the following error in the console:

Failed to construct 'URL': Invalid base URL

Labels:
bug, documentation

To Reproduce

Steps to reproduce the behavior:

1. Set up the project using the Manual Setup Guide (Option 4)
2. Complete the local setup and launch the app at http://localhost:3000/
3. Create a workflow
4. Click "Run" to execute it
5. Observe the console error
6. Reference screenshot:
   

Expected behaviour

The workflow should execute without any error when running locally.
Including NEXT_PUBLIC_APP_URL=http://localhost:3000 in the .env file resolves the issue.

Screenshots

If this is considered valid, I’d love to contribute a quick PR to resolve it.