chore: add opencontainers labels to Dockerfiles

jibri/Dockerfile

@@ -1,3 +1,9 @@
+LABEL org.opencontainers.image.title=Jitsi Broadcasting Infrastructure (jibri)
+LABEL org.opencontainers.image.description=Components for recording and/or streaming a conference.
+LABEL org.opencontainers.image.url=https://github.com/jitsi/jibri
+LABEL org.opencontainers.image.source=https://github.com/jitsi/docker-jitsi-meet
+LABEL org.opencontainers.image.documentation=https://jitsi.github.io/handbook/
+
 ARG JITSI_REPO=jitsi
 ARG BASE_TAG=latest
 FROM ${JITSI_REPO}/base-java:${BASE_TAG}