More information for debugging

[cintek]

To make debugging easier we should show some build information in the client. Therefore, we want to show a build number of the client (#19) and the backend (#20) in the client. One possible place to do so would be an "About" section in the configuration menu of the client.

[ThomasJunk]

Commit f8fbac2 has a basic version of this.

[bernhardreiter]

@koplas for the backend and the version number:

https://tip.golang.org/doc/go1.18#go-version says that go now embeds some info, is worth trying out, the problem is just that git describe does not deliver a correct Semver re-release version number. So the solution in the Makefile of csaf_distribution still seems cool for the backend. We could add and display the new go build information additionally.

[koplas]

@koplas for the backend and the version number:

https://tip.golang.org/doc/go1.18#go-version says that go now embeds some info, is worth trying out, the problem is just that git describe does not deliver a correct Semver re-release version number. So the solution in the Makefile of csaf_distribution still seems cool for the backend. We could add and display the new go build information additionally.

Currently go only includes useful version information on go install or go get and not go build. For more info see golang/go#50603.
As a workaround, the version information can be overwritten with:

go build -ldflags "-X main.version=v0.1.0" ....

If the issue is fixed the flag can be removed, without changing the code.

[koplas]

This is completed with: 715d613.