fix(gog): make sure game directory is mounted in container

[imLinguin]

Use the following Checklist if you have changed something on the Backend or Frontend:

• Tested the feature and it's working on a current and clean install.
• Tested the main App features and they are still working on a current and clean install. (Login, Install, Play, Uninstall, Move games, etc.)
• Created / Updated Tests (If necessary)
• Created / Updated documentation (If necessary)

[arielj]

how can we test this? like, how can we reproduce the problem this is fixing to know what to look for?

[Etaash-mathamsetty]

code looks fine, but is this only an issue with gog ?

[imLinguin]

it might affect others as well, I haven't experienced any issues though...

[imLinguin]

what this essentially does is allows to mount game directory during setup. This is crucial especially when mount point is in non-standard location that is not handled by pressure vessel out of the box

[arielj]

Sorry, not sure what you mean by mount, you mean using the game's install folder as the current working directory?

[imLinguin]

soldier and sniper runtimes are container based and have limited list of paths they expose in container by default. Adding STEAM_COMPAT_INSTALL_PATH env variable does exactly that, makes sure container exposes game directory.
Current working directory was another addition I had to make in order for setup to succeed.