install contemporary git and clang

[qrkourier]

resolves #5

[ekoby]

couple more tools:

• clang-tidy (from llvm repo)
• cppcheck
• gcov

[qrkourier]

• gcov

@ekoby gcovr?

[ekoby]

• gcov

@ekoby gcovr?

I guess gcov is part of gcc install. gcovr would be useful to generate readable reports

[qrkourier]

Relevant discussion about sticking with gcc v7 on Bionic vs compiling gcc v11 or v13 from source in this thread: #5 (comment)

[qrkourier]

I pushed this branch's local container image build to docker.io/kbinghamnetfoundry/ziti-builder:latest and tested the ZET's main cmake.yml workflow here: https://github.com/openziti/ziti-tunnel-sdk-c/actions/runs/5931869807?pr=716

[scareything]

We could run these build steps (and any apt installs that are only needed for gcc) in a stage and then COPY the install directory into the final stage of this image. This makes cleanup perfect and effortless.

[qrkourier]

I agree that will eliminate any compilation-related bloat in the final image, if we decide to go the route of compiling the three gcc v11 or v13 suites for native, cross-arm, cross-arm64.