Implement Docker build + Add Helm Chart

[MochaCaffe]

Motivation

This PR implements the elements for a Docker build, along with a deployment on a Kubernetes cluster via a standalone Helm Chart.

Modifications

• Add Docker commands in the Makefile
• Add Helm Chart deployment that contains a MariaDB sidecar container
• Configuration file:
  • The dashboard now requires the configuration argument to be a directory
  • The configuration is now split between config.yaml and mysql.yaml in order to manage credentials apart from the main configuration (the Chart mounts the mysql credentials as a secret)
  • Remove the Encryption/Decryption operation of the mysql password