comp AP gateway: convert pubsub item retractation to AP `Delete` activity: when an item `retract` is received from a node from which an AP actor is subscribed, a corresponding `Delete` activity is created and sent to AP followers. Trying to retract an item from a virtual node of the gateway pubsub service now return a `forbidden` stanza error (those nodes are handled on AP side and thus are not owned by XMPP entities). rel 367

FROM libervia/prosody:e2e

LABEL maintainer="Goffi <tmp_dockerfiles@goffi.org>"

RUN prosodyctl register demo server1.test demo