Add Spring Actuator Endpoints

[chrisvrose]

Closes #45 .

This exposes one endpoints, that shows the build information, and the the (last) commit id which it was built from.

health

API: GET /actuator/info

Example response:

{
  "git": {
    "branch": "build-info",
    "commit": {
      "id": "86ae0ea",
      "time": "2024-05-26T05:40:12Z"
    }
  },
  "build": {
    "artifact": "gatekeeper",
    "name": "gatekeeper",
    "time": "2024-05-26T05:41:42.583Z",
    "version": "0.1.2-SNAPSHOT",
    "group": "org.ieee-rvce"
  }
}

How does this help?

Github shows a commit history, with a commit ID for each change you make:

If you hit this endpoint and the ID for your change is shown here, then you can be sure your version is deployed.

Extra

The version gradle.properties is also shown, along with build time, for extra information.