web,prosody,jvb: prepare for new stable release

web/Dockerfile

@@ -1,15 +1,19 @@
 ARG JITSI_REPO=jitsi
 FROM ${JITSI_REPO}/base
 
+COPY rootfs/ /
+
 RUN \
 	apt-dpkg-wrap apt-get update && \
 	apt-dpkg-wrap apt-get install -y cron nginx-extras jitsi-meet-web && \
 	apt-dpkg-wrap apt-get install -y -t stretch-backports certbot && \
+	apt-dpkg-wrap apt-get -d install -y jitsi-meet-web-config && \
+    dpkg -x /var/cache/apt/archives/jitsi-meet-web-config*.deb /tmp/pkg && \
+    mv /tmp/pkg/usr/share/jitsi-meet-web-config/config.js /defaults && \
+	mv /usr/share/jitsi-meet/interface_config.js /defaults && \
 	apt-cleanup && \
 	rm -f /etc/nginx/conf.d/default.conf && \
-	rm -f /usr/share/jitsi-meet/interface_config.js
-
-COPY rootfs/ /
+	rm -rf /tmp/pkg /var/cache/apt
 
 EXPOSE 80 443