Update readme.md

Update readme.md

updated package.json and lock to have webpack v5 and sass v10

upgraded react and react-dom from version 16.0.0 to 16.1.1

removed engines from package.json

added build script in package.json

readded package-lock.json

still trying deletions

deleted package.json

updated npm and node to hopefully compatible versions

added node_modules to commit and removed from gitignore

First commit