test: add tests for the DEBUG flag

test/test_debug/test_proxy-debug-flag.yml

@@ -0,0 +1,27 @@
+web1:
+  image: web
+  expose:
+    - "80"
+    - "81"
+  environment:
+    WEB_PORTS: "80 81"
+    VIRTUAL_HOST: "web1.nginx-proxy.tld"
+    VIRTUAL_PORT: "82"
+
+web2:
+  image: web
+  expose:
+    - "82"
+    - "83"
+  environment:
+    WEB_PORTS: "82 83"
+    VIRTUAL_HOST: "web2.nginx-proxy.tld"
+    VIRTUAL_PORT: "82"
+
+sut:
+  image: nginxproxy/nginx-proxy:test
+  volumes:
+    - /var/run/docker.sock:/tmp/docker.sock:ro
+    - ../lib/ssl/dhparam.pem:/etc/nginx/dhparam/dhparam.pem:ro
+  environment:
+    DEBUG: "true"