One is for retrieving node_modules from container and copy the contents 
into a local directory.
The other is for installing new packages into container. This will 
autmatically be synced to local.

resolves https://github.com/iqb-berlin/testcenter-frontend/issues/281

resolves https://github.com/iqb-berlin/testcenter-frontend/issues/278

resolves https://github.com/iqb-berlin/testcenter-frontend/issues/279

by giving systemAnnouncement a starting value

Bumps [hosted-git-info](https://github.com/npm/hosted-git-info) from 2.8.8 to 2.8.9.
- [Release notes](https://github.com/npm/hosted-git-info/releases)
- [Changelog](https://github.com/npm/hosted-git-info/blob/v2.8.9/CHANGELOG.md)
- [Commits](https://github.com/npm/hosted-git-info/compare/v2.8.8...v2.8.9

)

Signed-off-by: dependabot[bot] <support@github.com>

The old one was result of experimentation. The backend address should be 
/api so it works out of the box.

resolves https://github.com/iqb-berlin/testcenter-frontend/issues/247