How to increase the upload file size limit? Error shown

Support
2

Add this at the bottom of your app.yml in custom commands, then rebuild:

## Any custom commands to run after building
run:
  - exec: echo "Beginning of custom commands"
  - replace:
        filename: "/etc/nginx/conf.d/discourse.conf"
        from: /client_max_body_size.+$/
        to: client_max_body_size 1000m;