Co-authored-by: Alexander Rudolph <drblaui@users.noreply.github.com>

Co-authored-by: Alexander Rudolph <drblaui@users.noreply.github.com>

Staff UI Implementation

Closes #20

See merge request swp-ws21-fahrtenbuch/team-einhorn/fahrtenbuch!19

Merge 21-implement-api-endpoints

Closes #21

See merge request swp-ws21-fahrtenbuch/team-einhorn/fahrtenbuch!17

- added dynamic titles by using helmet
- updated dependencies
- fixed client build process (overwrite in package.json for one package)
- fixed href reloading page by using as

Merge branch '21-implement-api-endpoints' of git.imp.fu-berlin.de:swp-ws21-fahrtenbuch/team-einhorn/fahrtenbuch into 21-implement-api-endpoints

- Fixed minor issues
- Added several forms