Unsure what git commit an Indexer is running

[jhult]

Add a REST endpoint (e.g. /version or /about) that provides the git commit ('git rev-parse --short=8 HEAD) this Indexer instance was built against.

Note that the --version for the CLI returns mina-indexer 0.1.1 (due to this in Cargo.toml). We want the version (CLI command) to be the git commit (or perhaps something like Calendar Versioning).

[jhult]

This relates to https://github.com/Granola-Team/mina-block-explorer/issues/698 and the implementation PR #702:

[trevorbernard]

I was going to suggest adding a build.rs but you beat me to it. You could use something like the BUILDKITE_COMMIT env variable to set this value in CI/CD

[robinbb]

For consistency, please use the output of 'git rev-parse --short=8 HEAD', run at build time.

[trevorbernard]

For simplicity sake (and simplest solution to the problem), I fixed the CLI version command to include the git commit hash. If we really want to add an API, it should be another issue.