dev-daramir/ dashboard update keep network deps

[daramir]

Description

This is an update to the references on solidity/dashboard/package.json dependencies, to the latest ones deployed on Ropsten. Added a short getting started to running local against Ropsten in the Readme

Checklist

• [X] Fork keep-network/keep-core
• [X] Clone your fork
• [X] Describe the change you are intending to undertake in the PR description.

Before marking the PR as ready for review, make sure:

• [X] It passes the linter checks (npm run lint) (see Pre-commit to make this automatic). Linter npm run js:lint ran successfully
• [X] It passes the continuous integration tests on CircleCI. I don't have access to this CircleCI Org
• [X] Your changes have sufficient test coverage (e.g regression tests have been added for bug fixes, unit tests for new features)
• [X] Commits must be signed.