Incorrect eslint/prettier config in project generator

[akash1810]

The project generator does not configure eslint to fail on Prettier errors. This means inconsistent quote marks, spacing, etc are never caught. Specifically, the package.json is missing the eslint-plugin-prettier dependency.

We should either:

• Fail the lint step on Prettier errors
• OR remove Prettier entirely

See https://github.com/guardian/apps-anomaly-detection/pull/10 for a worked example of the former.