workflow: added a test, build and release workflow

[mickvandijke]

closes #59

• Embed the license in the application and make it easily accessible for users #67

[mickvandijke]

Hey @da2ce7 ,

I have made a workflow that automatically releases compiled binaries of the index-backend when the main branch is updated.

I am however wondering if we have to include a license notice with every binary? And if so, do we have to do the same thing for every crate in the Cargo.toml?

[da2ce7]

@WarmBeer I think that it is good to include the LICENCE file in the packages as a general rule.

I don't know if it required by the license to include the license, I suspect for AGPL it is required to also include a copy of it. - However I don't think that this requirement is so important. We could make this exception official by adding a the line to our license.

"We make the exception that projects that distribute this work only need to include the name and version of the license, instead of needing to include them verbatim in the package".