fix: adjust file permissions in case the symfony dev server is starte…

[philipreinken]

…d as root

---

We've got failing builds due to permission errros like this one:

"errors": [
    {
      "status": "400",
      "code": "THEME__COMPILING_ERROR",
      "title": "Bad Request",
      "meta": {
        "parameters": {
          "themeName": "Storefront",
          "message": "Unable to set visibility for file theme-variables.scss. chmod(): Operation not permitted"
        }
      },
      "trace": [
...

I think this is due to the symfony dev server dropping privileges automatically when being run as root: https://github.com/symfony-cli/symfony-cli/blob/main/local/php/fpm.go#L41-L51

This PR adds similar logic to our workflow to set the file permissions accordingly.

[shyim]

why is the image running as root?

[philipreinken]

why is the image running as root?

We've just been using the defaults of the catthehacker/ubuntu image. Thanks for the hint, I think we could circumvent it as well by providing the corresponding options to the container config. I'll try that out.

[philipreinken]

The shivammathur/setup-php action requires root privileges to interact with apt and install various packages. So I don't see an easy way around it at the moment 🤔

[shyim]

isn't it just calling sudo?