feat(docker): add Dockerfile for containerization

[GwendalBeaumont]

This PR adds a Dockerfile to the repository to enable image container building of the app.

closes #10

[GwendalBeaumont]

As of now, this works as long as you bind a folder containing the model.mxp file to the container using -v /path/to/dir:/data.

path/to/dir must contain the mxp file OR it should also be possible to pass another model file by appending the run command with -m path/to/mxp/file.mxp.

[GwendalBeaumont]

Added a workflow to build and publish the image to GitHub Container Registry when a new release is published (to avoid build too often).