Make it possible to run the template without docker

[davisagli]

Fixes #79

This makes it possible to run the template even if Docker is not installed or not running. In that case the "make format" step will log an error, but won't prevent the template from completing.

[jensens]

+1 for not failing.
Is there any reason to not use Precommit or alike, like everywhere else? Dependening on Docker just to lint/format is a bit much IMHO.

[jensens]

Approved as a first small improvement.

[davisagli]

Is there any reason to not use Precommit or alike, like everywhere else? Dependening on Docker just to lint/format is a bit much IMHO.

@jensens I was going for a quick fix, but Érico and Steve also made this point after I submitted this and I think we will give it a try.