Updating documentation

commento.md

@@ -0,0 +1,34 @@
+# Commento
+
+<https://docs.commento.io>
+
+## Using docker
+
+You can use docker-compose to quickly start up commento with a postgres instance.
+
+```yaml
+version: "3"
+
+services:
+  server:
+    image: registry.gitlab.com/commento/commento
+    ports:
+      - 80:8080
+    environment:
+      COMMENTO_ORIGIN: localhost
+      COMMENTO_PORT: 8080
+      COMMENTO_POSTGRES: postgres://postgres:postgres@db:5432/commento?sslmode=disable
+    depends_on:
+      - db
+  db:
+    image: postgres
+    environment:
+      POSTGRES_DB: commento
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+    volumes:
+      - postgres_data_volume:/var/lib/postgresql/data
+
+volumes:
+  postgres_data_volume:
+```