Show changelog on core update

[pablomendezroyo]

After a core release, there might be several changes to core packages (dappmanager, ipfs, wireguard, etc) without the user notifying any of them. To provide the user a better feedback about what is going on, design a changelog to be displayed right after the core release:

Implementation

• Find a project directory path for the changelog, that should have the following file structure:
  • changelog
    • vx.y.z
      • 1
        • changes.md
        • img.png
• Implement the corresponding COPY (s) in the Dockerfile
• Implement the Modal component
• Whenever a core update gets triggered, it should reflect this status on disk (probably on db), defining the current core version.
• Trigger the show Modal event whenever the dappmanager starts and finds it has been updated using dappnode state systemInfo
• Consider only showing the Modal if it exists in the previous version and/or it's a patch update

Changelog modal

• There should be a title indicating the version to where it has been updated and ideally from which version was updated
• The modal will be in markdown text
• The modal will be a stepper of new features on each step and an optional image
• Consider adding img/s to be rendered in the modal