Update modules Dockerfiles

[netsandbox]

Update the modules/Dockerfile:

• use apt-get instead of apt in modules/Dockerfile
  Do not use apt as it is meant to be an end-user tool.

• use "-o pipefail" for RUN commands in modules/Dockerfile
  see:
  https://docs.docker.com/develop/develop-images/dockerfile_best-practices/#using-pipes
  https://github.com/hadolint/hadolint/wiki/DL4006

[thresheek]

Thanks for the contribution @netsandbox !

Any chance you would provide the same fix for pipefail for an alpine-based modules Dockerfile?

[netsandbox]

@thresheek I have updated now also the alpine Dockerfile.

[netsandbox]

@thresheek anything else I can do to get this merged?

[thresheek]

Thanks @netsandbox !