Ubuntu22-compatible build (Dockerfile)

[Zaburunier]

A few latest releases of AmneziaVPN are incompatible with Ubuntu 22.04. I needed VPN for my home PC which runs exactly 22.04, so I made this Dockerfile to address the issue.

[Zaburunier]

Things to note:

1. At the moment, Qt official installer is used. This means, valid Qt account is required. This is done by sharing qtaccount.ini file with container via --mount=type=secret in Dockerfile. Also login/password can be passed as build arguments but this is insecure and thus disabled (commented out) by default.
2. Since I don't have access to Amnezia's conan remote, I had to use the following workaround:

• Prepare conan packages outside CMake build process using default remote conancenter (see stage 3 in Dockerfile)
• Pass --no-remote to CMake build process to force local cache usage (see toolchain file in stage 5)

3. This Dockerfile can be easily extended to any Linux distribution. The single distro-specific thing I used is apt-get. CMake and Ninja is taken from Qt installation. Some very old distro can be selected to provide widest possible compatibility range (glibc release etc.). The only question is: will it be useful for you?

[Zaburunier]

Launch command example:

DOCKER_BUILDKIT=1 docker build --secret id=qt_credentials,src=$HOME/.local/share/Qt/qtaccount.ini --file docker/ubuntu-22.04.Dockerfile --tag amnezia-ubuntu22 .

Then, to retrieve installation package:

docker container create --name amnezia-ubuntu22-container amnezia-ubuntu22 .
docker container cp amnezia-ubuntu22-container:/dist/. ./.build-dockerfile/
docker container rm amnezia-ubuntu22-container

---

Do everything with a single command:

DOCKER_BUILDKIT=1 docker build --secret id=qt_credentials,src=$HOME/.local/share/Qt/qtaccount.ini --file docker/ubuntu-22.04.Dockerfile --tag amnezia-ubuntu22 --output=./.build-dockerfile/ .

[Zaburunier]

I know that releases are currently built the other way, this is just draft from personal use case. I am totally open for discussion, maybe there is something I can be helpful with.