We no longer ship the sanify file as part of the SDK but
expect it be generated on first use:
https://github.com/WebAssembly/waterfall/pull/656
Also remove the Dockerfile itself from the docker image if
we include it then whenever you change anything in the
Dockerfile it invalides all the layers and forces a
completely rebuild. This makes iterating on the image
very slow.
- Copy the current checkout to the Dockerfile.
- Add .dockerignore to exclude files while copying.
- Test tip-of-tree build within CI.
- Run the test suite outside the Docker image.
- Perform extra sanity tests.
- Switch to make commands for CircleCI.
- Improve Docker README.
