WIP: Feature/#64 healthcheck

Feature

Summary

This MR provides a HEALTHCHECK to see if the API is basically running.

NOTE The healthcheck only applies to /info since we cannot be sure that the database is already filled with data in local development. Also, this MR only provides the general structure–feel free to add to it.

Additionally, this MR adds a missing step for local installation to the README.

Tests

Build the database anew locally and use docker-compose ps to see the container's health status.

Changelog

• I added a statement to the CHANGELOG.

Is this necessary for changes in the Docker setup?

Version number

• I bumped the version number in build.properties.

Is this necessary for changes in the Docker setup?

Related Tickets

Closes

Closes #64

/cc Mathias Göbel, Frank Schneider, Michelle Weidling