adds maintenance.md and updates readme

MEINTENANCE.md

@@ -0,0 +1,32 @@
+# Pretix Recipe Maintenance
+
+All contributions should be made via a pull request. This is to ensure a
+certain quality and consistency, that others can rely on.
+
+## Maintainer Responsibilities
+
+A recipe maintainer has the following responsibilities:
+
+- Respond to pull requests / issues within two weeks
+- Make image security updates within a week
+- Make image major updates every three months
+
+In order to fullfill these responsibilities a recipe maintainer:
+
+- Has to watch the repository (to get notifications)
+- Needs to make sure renovate is configured properly
+
+## Pull Requests
+
+A pull request can be merged if it is approved by at least one maintainer. For
+pull requests opened by a maintainer they need to be approved by another
+maintainer. Even though it is okay to merge a pull request with one approval, it
+is always better if all maintainers looked at the pull request and approved it.
+
+## Become a maintainer
+
+Everyone can apply to be a recipe maintainer:
+1. Watch the repository to always get updates
+2. Simply add your self to the list in the [README.md](./README.md) and open a new pull request with the change.
+3. Once the pull request gets merged you will be added to the [pretix maintainers team](https://git.coopcloud.tech/org/coop-cloud/teams/pretix-maintainers).
+4. Join the room [#cc-|-pretix-maintenance:matrix.org](#cc-|-pretix-maintenance:matrix.org) and chat to other maintainers.

README.md

@@ -4,6 +4,7 @@
 
 <!-- metadata -->
 
+* **Maintainer**: Local-IT: [@moritz](https://git.coopcloud.tech/moritz), [@msimon](https://git.coopcloud.tech/simon), [@carla](https://git.coopcloud.tech/carla)
 * **Category**: Apps
 * **Status**: 0
 * **Image**: [`pretix`](https://hub.docker.com/r/pretix), 4, upstream

compose.yml

@@ -3,7 +3,7 @@ version: "3.8"
 
 services:
   app:
-    image: "pretix/standalone:2026.2.0"
+    image: "pretix/standalone:2026.5.1"
     networks:
       - proxy
       - internal
@@ -26,7 +26,7 @@ services:
         - "traefik.http.routers.${STACK_NAME}.rule=Host(`${DOMAIN}`${EXTRA_DOMAINS})"
         - "traefik.http.routers.${STACK_NAME}.entrypoints=web-secure"
         - "traefik.http.routers.${STACK_NAME}.tls.certresolver=${LETS_ENCRYPT_ENV}"
-        - "coop-cloud.${STACK_NAME}.version=2.6.1+2026.2.0"
+        - "coop-cloud.${STACK_NAME}.version=2.7.0+2026.5.1"
     healthcheck:
       test: ["CMD", "curl", "-f", "http://localhost/healthcheck"]
       interval: 30s
@@ -72,7 +72,7 @@ services:
         backupbot.restore.post-hook: "/pg_backup.sh restore"
 
   redis:
-    image: redis:8.6.1-alpine
+    image: redis:8.8.0-alpine
     volumes:
       - "redis:/data"
     healthcheck: