Add Dockerfile - #124

Version 2.7 with arch x64 not found The list of all available versions can be found here: https://raw.githubusercontent.com/actions/python-versions/main/versions-manifest.json

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v2, actions/setup-python@v2, fiam/arm-none-eabi-gcc@v1, mymindstorm/setup-emsdk@v7. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

The support for python 2.7 will be removed on June 19. Related issue: https://github.com/actions/setup-python/issues/672