This setup chooses to avoid the env_file option available for Docker
Compose files. Docker has a peculiar way of parsing variables which
makes it, for example, include quotes verbatim.
This is both confusing and incompatible with shells parsing the same
file which is a requirement. For this reason, the configuration does
not import the complete environment using env_file but assigns variables
explicitly on a need-to-know basis in the YAML file, much like Docker
secrets.
Since the configuration is generated automatically, the burden on users
is the same as with env_file: they only need to edit .env for
customizations.
build.sh replaces docker-compose as an image build tool. Instead, all
OpenSlides services can be built using this script which offers various
important options such as tagging and configurable defaults.
The now-redundant build instructions have been removed from the YAML
templates.
The almost identical server and client build scripts have been made
fully identical.
We have decided against including an insecure default key with a mere
warning. Therefore, unlike the admin and user secrets, the availability
of this secret is a hard requirement. The instance will not be able to
start before a secret has been generated manually or by a management
tool.
