Add a commit link to see what build is deployed #14

[mblomdahl-bot]

Local runtime:

1. An extra build-info.json is added in the source root with mock info
2. Development builds compile without further workarounds

Deployed runtime:

1. When triggering a build, GitHub Actions extracts the info of interest
2. Build information is injected in the React project, overwriting mock data
3. The commit and build timestamp is stamped into the compiled build
4. Build output is uploaded and published to GitHub Pages

Resolves #14.

Proof That It Works

See https://mblomdahl-bot.github.io/web-client/ for the GitHub Actions deployment from my fork:

[mblomdahl-bot]

After the update in c9a3ae2.... 🙃