diff --git a/README.md b/README.md
index 72e2f24..208aabb 100644
--- a/README.md
+++ b/README.md
@@ -1,12 +1,40 @@
+# Self-host
+
+Configuration of my Hetzner Cloud VPS
+
+## Services I am currently self-hosting:
+
+- Grafana
+- Linkding
+- Forgejo
+- RocketChat
+
+## Service data
+
+Most application data is stored in a network-attached Hetzner Storagebox drive
+("Storagebox Alpha"). Docker volumes are mapped to this location.
+
+This device is permanantly mounted using the [CIFS
+protocol](https://www.lenovo.com/gb/en/glossary/what-is-common-internet-file-system-cifs/)
+at `mnt/storagebox_alpha`. See `/etc/fstab`.
+
+For certain services, data is stored on the small harddrive of the VPS:
+
+| Service | Data           | Location | Description                                    |
+| ------- | -------------- | -------- | ---------------------------------------------- |
+| Forgejo | MySQL database |          | Database data only. Repositories stored in NAS |
+
 ## Port mappings
 
 | Range | Function         |
 | ----- | ---------------- |
 | 8000  | Web applications |
 
-## Services
+### Services
 
-| Port | Subdomain                   | Service | Description                |
-| ---- | --------------------------- | ------- | -------------------------- |
-| 8000 | grafana.systemsobscure.net  | Grafana | Server logs and monitoring |
-| 8001 | wallabag.systemsobscure.net | Grafana | Article bookmarking tool   |
+| Server port | Docker port | Subdomain                     | Service    | Description                |
+| ----------- | ----------- | ----------------------------- | ---------- | -------------------------- |
+| 8000        | 3000        | grafana.systemsobscure.net    | Grafana    | Server logs and monitoring |
+| 8001        | 9090        | bookmarks.systemsobscure.net  | Linkding   | Article bookmarking tool   |
+| 8002        | 3000        | forgejo.systemsobscure.net    | Forgejo    | Git forge                  |
+| 8003        | 3000        | rocketchat.systemsobscure.net | RocketChat | Messaging app, alerts      |