Improve error messages #245
Description
Motivated by #241.
This issue is to find error messages where we can include more info, to help users troubleshoot problems.
For instance, instead of
error while getting docker-compose container: error downloading https://github.com/docker/compose/releases/download/1.24.0/run.sh: Get https://github.com/docker/compose/releases/download/1.24.0/run.sh: dial tcp: lookup github.com on 171.172.3.251:53: no such host
It could be something like:
docker-compose is not installed, and there was an error while trying to install the container alternative: error downloading <url> to <destination file>: ....
There might be other places where we can make clearer errors.