Create cleanup scripts

[alechp]

Until gen suite is completed, add a package script to clean up:

• docker files
• readme (especially bloated graphics)

[alechp]

• remove docker related scripts from pkg.json

[alechp]

• move .env.sample to .env

[alechp]

• remove README.md (this is a symlink to NPM.md)
• rename "NPM.md" to "NSTAR.md" and update symlink

[alechp]

• logo images

[alechp]

• nstar.test.js (as soon as index.js changes, the tests will break)