Bump installer's version to 3.x-beta

Docker setup for theme of 3.x version.

Mutagen (Mac) support and stability improvements

What is inside?

• Mutagen support, allows to improve Mac performance
• You can run frontend container on the first install - the popular issue is now eliminated
• No more code duplications. One start script for most cases. Accepts options.
• Theme is no longer build in the app container if frontend container is in the stack
• Proper sequences in docker-compose files: depends_on and wait-for-it
• Bump of docker-compose version to 3.6

Magento 2.3.3

1.5.0

Updated readme

Release: 2.x theme support (new media, dump, dependencies)

In this release multiple ScandiPWA packages were updated, as dependencies of 2.2.0 source theme.

Media and dump was also updated.

Release: auto-restarting FE container, module version update

In this release the frontend and core containers now run with auto-restarting webpack-dev-server by default (using PM2).