* docker: refactor * github/docker: bump actions and adjust smp ports
* docker: major overhaul with xftp support * github: update docker actions * install: add installation scripts * readme: update readme to reflect latest changes
* Add GH Actions workflow to build and push Docker image on release * Use a matrix to support building other applications * Rename application from simplexmq to smp-server * Remove linux/386 platform * Remove linux/arm64 platform