NOTES
Build a new Docker container
docker build -t URL_FOR_CONTAINER .
For example:
docker build -t ponylang/ponyc-ci:llvm-3.9.1 .
To use a Dockerfile other than Dockerfile
in the local directory:
docker build -t ponylang/ponyc-ci:llvm-3.9.1 --file Dockerfile.llvm391 .