Docker container for ci test

[dreamer2368]

By using docker container, github ci test can contain only libROM-related parts for testing. Most installation steps for dependencies can be skipped, which can reduce the linux ci test time from about 15 mins to 5 mins.

• The recipe for the docker container is stored as .github/workflows/Dockerfile.
• The following steps are deleted, because all dependencies including googletest are pre-installed in the container:
  • Install Linux Dependencies
  • ./.github/workflows/checkout_repo
  • run: scripts/setup.sh
• Set Swap Space step is not needed any longer, because all dependencies are not installed within ci test. However, this step is still included in the CI test, just in case we may need extra space in the future.

Note:

• The docker container keeps the specific version (or commit) of mfem. While it necessitates manually updating the container occasionally, it also enables a stable CI test and development.

Issue:

• Mac CI test has been failing before this pull request, and this issue is separately handled by the pull request #175. Removed from the ci workflow .
• RandomizedSVDTest is susceptible to round-off error, failing randomly on different machine. This affects the test result under the container. See Issue #193 . Commented the corresponding test until the issue is resolved by a separate pull request.

TODO:

• Transfer the docker container dreamer2368/librom_env to LLNL dockerhub?

[chldkdtn]

@debog @dylan-copeland @siuwuncheung @sullan2 Would you mind reviewing this PR?

[debog]

@debog @dylan-copeland @siuwuncheung @sullan2 Would you mind reviewing this PR?

I think I am out of my depths here!

[dylan-copeland]

@debog @dylan-copeland @siuwuncheung @sullan2 Would you mind reviewing this PR?

I think I am out of my depths here!

Me too, and there are enough approvals already, so I will not review.