Task/add virtuoso sink

[AlvaroVega]

• SInk
• Doc

Using:

iot-virtuoso:
  container_name: iot-virtuoso
  restart: "unless-stopped"
  image: openlink/virtuoso-opensource-7:7.2.14
  volumes:
    - ${DBPATH_VIRTUOSO}:/data
  ports:
    - "8890:8890"
    - "1111:1111"
  environment:
    - DBA_PASSWORD=dba
    - SPARQL_UPDATE=true
    - DEFAULT_GRAPH=http://localhost:8890/DAV
``