Update Mattermost to 7.0, add release notes, add abra.sh file to fix deployment entrypoint issue

abra.sh

@@ -0,0 +1 @@
+export MATTERMOST_ENTRYPOINT_VERSION=v1

compose.yml

@@ -24,7 +24,7 @@ services:
       - internal
 
   app:
-    image: mattermost/mattermost-team-edition:5.39
+    image: mattermost/mattermost-team-edition:7.0
     security_opt:
       - no-new-privileges:true
     read_only: ${MATTERMOST_CONTAINER_READONLY}
@@ -59,6 +59,7 @@ services:
         - "traefik.http.routers.${STACK_NAME}.middlewares=${STACK_NAME}-redirect"
         - "traefik.http.middlewares.${STACK_NAME}-redirect.headers.SSLForceHost=true"
         - "traefik.http.middlewares.${STACK_NAME}-redirect.headers.SSLHost=${DOMAIN}"
+        - "coop-cloud.${STACK_NAME}.version=0.1.0+7.0"
     configs:
       - source: abra_mattermost_entrypoint
         target: /abra-mattermost-entrypoint.sh

release/0.1.0+7.0.txt

@@ -0,0 +1,6 @@
+This should be a fairly stable update. The only strange behaviour we've noticed so far has been:
+
+- When clicking on 'Channels' to change to 'Boards' or 'Playbooks', your window may flicker and just reload 'Channels'. Click 'Boards' or 'Playbooks' again and it should behave as expected.
+- When clicking on private messages, you may get an error telling you that you don't have permission to view these.
+
+To fix both of these errors, logout of your server in your Mattermost client, delete the server (if you are using an app), and then re-add it. We haven't noticed any issues after doing this.