Add branding and configuration for connectors

See merge request sibmip/gateway!40

feat: Add support for histograms and descriptives stats from Datashield API

See merge request sibmip/gateway!39

Update develop branch with last fixes

Moved to his own file (LICENSE)

Fix security problem with headers

See merge request sibmip/gateway!37

Jest file was in the wrong place causing different build structure

Group id was based on the group name causing duplicates
Group id is now based on the path (e.g. /grp1/grp2)

Resolve "Integration experiment portal frontend"

Closes #43

See merge request sibmip/gateway!21

Merge branch '43-integration-experiment-portal-frontend' of gitlab.com:sibmip/gateway into 43-integration-experiment-portal-frontend