This change verifies that `docker buildx` is available and then uses that
for building the images. For that we apparently need the magic line at
the top of the `Dockerfile`s and set the environment variable
`DOCKER_BUILDKIT`. This solves a problem building docker images on
Linux with an older Docker version where the heredocs didn't work.
This change fixes two issues in the Linux docker image that showed up
when running tests:
- some directories had wrong permissions
- we have to build keyman-system-service in a docker-specific directory
as well so that the location of the service executable can be found
when running the tests in docker
We need to run `apt-get update` first before trying to install packages.
We did update the package index when we built the base image, but that
might have been some time ago so that the index is now outdated.
- use KEYMAN_USE_NVM and KEYMAN_USE_EMSDK
- pre-install node (where necessary) to prevent having to do it on each
build
- adjust to current `master`
- fix a few bugs in the Dockerfile
- get required node version from package.json (through
`shellHelperFunctions.sh`)
This change allows to build a docker image that can build Keyman
for Linux with test coverage reports, and installs the necessary
dependencies for running integration tests.
