Copied from rancher community catalog as starting point

templates/OpenProject/0/docker-compose.yml

@@ -0,0 +1,22 @@
+version: '2'
+services:
+  openproject:
+    image: openproject/community:7
+    volumes_from:
+      - openproject-data
+    ports:
+      - ${OPENPROJECT_PORT}:80
+    labels:
+      io.rancher.sidekicks: openproject-data
+      io.rancher.container.hostname_override: container_name
+  openproject-data:
+    image: openproject/community:7
+    entrypoint:
+      - /bin/true
+    volumes:
+      - /var/lib/postgresql/9.4/main
+      - /var/log/supervisor
+      - /var/db/openproject
+    labels:
+      io.rancher.container.start_once: 'true'
+      io.rancher.container.hostname_override: container_name

templates/OpenProject/0/rancher-compose.yml

@@ -0,0 +1,20 @@
+version: '2'
+catalog:
+  name: openproject
+  version: 0.0.1
+  description: Project planning and scheduling
+  questions:
+
+    - variable: OPENPROJECT_PORT
+      label: Port
+      default: 80
+      required: true
+      type: int
+
+services:
+  openproject:
+    scale: 1
+    start_on_create: true
+  openproject-data:
+    scale: 1
+    start_on_create: true