diff --git a/apps/matrix/README.md b/apps/matrix/README.md
index 0026975..afd7446 100644
--- a/apps/matrix/README.md
+++ b/apps/matrix/README.md
@@ -19,3 +19,27 @@ What I want:
 - Being able to inject postgres secret
 - Postgres not restarting if synapse is getting updated
   - 2nd service could nicely solve that
+
+## input / image
+
+/data
+
+SYNAPSE_CONFIG_DIR: where additional config files are stored. Defaults
+to /data.
+
+SYNAPSE_CONFIG_PATH: path to the config file. Defaults to
+<SYNAPSE_CONFIG_DIR>/homeserver.yaml
+
+TZ: the timezone the container will run with. Defaults to UTC.
+
+docker run -d --name synapse \
+    --mount type=volume,src=synapse-data,dst=/data \
+    -p 8008:8008 \
+    matrixdotorg/synapse:latest run \
+    -m synapse.app.generic_worker \
+    --config-path=/data/homeserver.yaml \
+    --config-path=/data/generic_worker.yaml
+
+# admin user
+
+docker exec -it synapse register_new_matrix_user http://localhost:8008 -c /data/homeserver.yaml --help
diff --git a/apps/matrix/values.yaml b/apps/matrix/values.yaml
index ca1bccc..b0a6bac 100644
--- a/apps/matrix/values.yaml
+++ b/apps/matrix/values.yaml
@@ -19,14 +19,4 @@ enable_registration: false
 max_filesize_in_mb: 100
 
 elementVersion: "1.7.32"
-#synapseVersion: "1.38.0"
-synapseVersion: "latest"
-
-#synapse_config:
-# ---
-# apiVersion: v1
-# kind: ConfigMap
-# metadata:
-#   name: {{ tpl .Values.identifier . }}-matrixconfig
-# data:
-# {{ tpl (.Files.Glob "matrix/*").AsConfig . | indent 2 }}
+synapseVersion: "v1.48.0"