Add /health endpoint for service version control

[ochaplashkin]

Now, you need to look either at GitHub CI or log in to the virtual machine to understand which version is installed on the environment.

I suggest adding an additional endpoint "healthcheck", which will give the response:

GET /health

{
    "version": "master-b721d19"
    "status": "ok"
}

or, if tag is exist:

{
    "version": "1.0.0"
    "status": "ok"
}