Automate the project setup steps

[danielemery]

Update the docker-react cli tool to be able to:

• Validate that each of the project setup steps have been performed
• Perform the project setup steps

The steps as documented in the README are:

• Install docker-react package and validation library
• Creating an environment variable schema
• Importing generated environment variable file into index.html (this has some overlap with Invalidate environment variable file using hash #8)
• Creating a Dockerfile and .dockerignore
• Updating npm scripts
• Replacing references to build time environment variables with new window env