HTTP endpoint to import trusted data

Closes #7

See merge request !6

renamed old .gitlab-ci.yml and added new one

See merge request !5

Unit tests for infohub export functionality

Closes #8

See merge request !4

Use the signer service for adding VC and VP proofs

Closes #6

See merge request !3

The service doesn't use Vault client anymore as now
it asks the signer service for proofs.
Also golib is updated to the latest version.

HTTP endpoint for exporting policy evaluation results

Closes #3 and #5

See merge request !2

Initial service skeleton

Closes #2

See merge request !1