Docker causes a few issues for us here which imho outweigh the
benefits for us atm:
1. It is quite slow since we have to rebuild the image everytime. We
could fix this by caching the image somewhere but even that is
somewhat annoying since Azure does not provide local caches so we
would have to push the image to some external service and fetch it
everytime which is still somewhat slow.
2. It does not work on MacOS (even if you have docker on MacOS it is
not going to work since you will try to install the MacOS release
tarball in a Linux docker container).
On the other hand, DAML assistant allows us to specify the
installation directory and we get a fairly clean environment on CI so
the additional isolation we get from Docker is not that important for us.
* Make daml-asisstant forward --help as intended.
* Refactor command-line parser in daml-assistant.
* Fix issues with daml-assistant CLI.
* Misalign things for Martin.
