Add Docker setup and guide for building and running MostroP2P

[tincho70]

Summary

This PR adds Docker support to the MostroP2P repository, including a new Docker guide (DOCKER.md) and all necessary files to build and run the application using Docker and Docker Compose.

Changes

• Added DOCKER.md file with detailed instructions for:
  • Prerequisites for Docker and Docker Compose
  • Building and running the Docker container
  • Docker Compose configuration
• Added Dockerfile to define the Docker image build process.
• Added compose.yml for Docker Compose configuration.
• Added empty.mostro.db, an empty SQLite database required by the application.
• Added settings.docker.toml, a configuration file (template) for the application.
• Added start.sh, a script to start the application inside the Docker container.

Why

These additions will help users and developers set up and run the MostroP2P application using Docker and Docker Compose, ensuring a consistent and simplified setup process. This will also make it easier to manage dependencies and environment configuration.

@grunch @arkanoider Please review the changes and provide feedback.

[arkanoider]

If it works @grunch i think it's a super cool add, ease the process to play with mostrod.
For me it's a merge!

[grunch]

Great add @tincho70 LGTM!

[arkanoider]

Merge it!

[grunch]

Merge it!

approve it