Add docker build workflow

[ocd0711]

Please remember to add the secrets parameters (DOCKER_HUB_USERNAME, DOCKER_HUB_ACCESS_TOKEN, DOCKER_HUB_REPO_NAME) to your GitHub Actions.

[CoelacanthusHex]

Please rebase to make https://github.com/estkme-group/lpac/commits/55948274cc1ad1261288a250be371748aa1dcdda on the top, or there will be a conflict unresolvable.

[BeRealQueally]

Close As rlpa-server will be stored in a new repo in future suggest to use this workflow in ur own fork and upload in ur own dockerhub