Dockerfile to scaffold a rails app
Build image
docker build -t yori-s/bootstrap-rails:latest .
bash into a transient container with /tgt mounted to the host directory for the new app
docker run --rm -it -v ~/git/scratch/kafka-test/sql:/tgt yori-s/bootstrap-rails:latest bash
Scaffold the app - in this case with sqlserver
rails new /tgt --api -d sqlserver -M -C -A
Create a development Dockerfile for the new app
./dockerfile-dev.sh > /tgt/Dockerfile-dev