You can find deployment instructions and the Databus MOSS Frontend via the main repo.
To create entries on a MOSS instance first create an API using the MOSS web application. Then call https://moss.dev.dbpedia.link/api/v1/save-entry with request parameters module and resource. The list of available modules can be requested via https://moss.dev.dbpedia.link/api/v1/modules. The resource parameters specifies the Databus resource being extended by the entry.
curl --request POST \
--url 'https://moss.dev.dbpedia.link/api/v1/save-entry?module=keyword&resource=https%3A%2F%2Fdatabus.dbpedia.org%2Fdbpedia-enterprise%2Fenriched-source-snapshots' \
--header 'Content-Type: text/turtle' \
--header 'X-API-KEY: [API_KEY_GOES_HERE]' \
--data 'PREFIX schema: <https://schema.org/>
<https://databus.dbpedia.org/dbpedia-enterprise/enriched-source-snapshots>
schema:keywords "simple" . '