Merge branch 'dev-ci' into 'master'

Optimize CI and remove deployment steps, add Mattermost and update Etherpad

See merge request picasoft/projets/dockerfiles!44

pica-dokuwiki/docker-compose.yml

@@ -2,7 +2,7 @@ version : "2.4"
 
 volumes:
   dokuwiki-app-volume:
-    external: true 
+    external: true
     name: "dokuwiki-app"
 
 networks:
@@ -11,7 +11,7 @@ networks:
 
 services:
     dokuwiki-app:
-        image: pica-dokuwiki:stable
+        image: registry.picasoft.net/pica-dokuwiki:stable
         container_name: dokuwiki-app
         volumes:
           - dokuwiki-app-volume:/var/www/html