test: add example docker-compose

test/assets/docker-compose-a.yaml

@@ -0,0 +1,10 @@
+version: "3.3"
+services:
+  app:
+    environment:
+    - HTTP_PROXY=1.2.3.4:8080
+    image: repository:version
+    ports:
+    - 8080:80
+    volumes:
+    - /etc/localtime:/etc/localtime

test/assets/docker-compose-b.yaml

@@ -0,0 +1,10 @@
+version: "3.3"
+services:
+  app:
+    environment:
+    - HTTP_PROXY=4.3.2.1:8080
+    image: repository:version
+    ports:
+    - 10080:80
+    volumes:
+    - /usr/share/zoneinfo/UTC:/etc/localtime