FTP: user ID for containers from environment

[ennru]

Commit 1:

• Upgrade docker compose file version
• Shell script to start FTP containers (didn't get default values to work locally)

Refs #1810 and #2816

Commit 2:

• Remove remaining Travis references

[jrudolph]

I wonder if it only works accidentally because UIDs are numerical and the local user might have a standard UID that may by accident also be present in the container?

[ennru]

I wonder if it only works accidentally because UIDs are numerical and the local user might have a standard UID that may by accident also be present in the container?

That was exactly what broke it. It had hardcoded ids that worked on Travis, but not on GitHub CI. In #1810 users reported similar issues with running the FTP tests locally.

[jrudolph]

I wonder if it only works accidentally because UIDs are numerical and the local user might have a standard UID that may by accident also be present in the container?

That was exactly what broke it. It had hardcoded ids that worked on Travis, but not on GitHub CI. In #1810 users reported similar issues with running the FTP tests locally.

Ah I see. Didn't get before that you had to access those files from outside the container.