Aggiunta compose come formato per yaml.

vim/UltiSnips/yaml.snippets

@@ -39,3 +39,18 @@ snippet shellpipe "Creates a task with module shell and which supports pipes." b
   args:
     executable: /bin/bash
 endsnippet
+
+snippet compose "Creates the skeleton of a docker-compose.yml file." b
+---
+version: '3'
+
+services:
+  ${1:${VISUAL:container}}:
+    image: ${2:image}
+    container_name: $1
+    restart: unless-stopped
+    environment: $0
+    ports:
+    volumes:
+    networks:
+endsnippet