[FEATURE REQUEST] Docker Image support #36

Is your feature request related to a problem? Please describe.
AS a DEVELOPER in need of my own self-hosted version of DesignPatternPedia I WANT a Docker Image available SO I don't need to worry about compiling the application myself.

Describe the solution you'd like

• A Docker file has been created in the root of the repo.
• A GitHub Action has been made to compile the website into a docker image on production release.
• The Docker Image artifact is publicly published to DockerHub.
• A script has been made to locally test the creation of the Docker Image.
• Instructions have been added on how to use the Docker image locally and (basic) self hosting instructions are present.

Describe alternatives you've considered
N/A