A docker container will be launched that will update the cobalt.dev source files in the Cobalt repository specified by the environment variable
COBALT_SRC or the current working directory, which should be the root of the Cobalt repository, if that environment variable is not set.
docsite service is run, the container will then host the updated cobalt.dev site locally on port
docsite-build-only service is run, the container will build and output the site content in the directory
out/deploy/www at the root of the Cobalt directory, and copy the app.yaml deployable into
docker-compose build --build-arg UID=$(id -u) --build-arg GID=$(id -g) SERVICE
docker-compose up SERVICE
A separate docker-compose.yml was created due to the root docker-compose.yml being unable to locate the Gemfile in the Docker build context.
The Gemfile was copied from third_party/repo-publishing-toolkit/Gemfile because we need to run
bundle install with elevated permissions but if we let the
preview-site.sh, which normally installs gems, run with elevated permissions the resulting files added or modified would not be accessible to the user who ran the Docker container.