added healthcheck and release note

README.md

@@ -1,17 +1,17 @@
 # ghost
 
-Headless Node.js CMS for professional publishing
+Node.js CMS for professional publishing (headless possible).
 
 <!-- metadata -->
 
 * **Category**: Apps
-* **Status**:
-* **Image**:
-* **Healthcheck**:
-* **Backups**:
-* **Email**: Y
-* **Tests**:
-* **SSO**:
+* **Status**: 3, stable
+* **Image**: [`ghost`](https://hub.docker.com/_/ghost), 4, upstream
+* **Healthcheck**: Yes
+* **Backups**: Yes
+* **Email**: Yes
+* **Tests**: No
+* **SSO**: N/A
 
 <!-- endmetadata -->
 
@@ -28,3 +28,8 @@ Headless Node.js CMS for professional publishing
 
 [`abra`]: https://git.coopcloud.tech/coop-cloud/abra
 [`coop-cloud/traefik`]: https://git.coopcloud.tech/coop-cloud/traefik
+
+
+## Further configuration
+### Matrix-Synapse configuration
+If you want to use Ghost on a top-level-domain which you want to use as matrix server name as well, just uncomment the respective section in `YOURAPPDOMAIN.env` and insert your `MATRIX_DOMAIN`