test: re-organize test files

test/test_ports/test_VIRTUAL_PORT-single-different-from-single-port.py

@@ -0,0 +1,8 @@
+import pytest
+import re
+
+
+def test_answer_is_served_from_virtual_port_which_is_ureachable(docker_compose, nginxproxy):
+    r = nginxproxy.get("http://web.nginx-proxy.tld/port")
+    assert r.status_code == 502
+    assert re.search(r"\n\s+server \d+\.\d+\.\d+\.\d+:90;\n", nginxproxy.get_conf().decode('ASCII'))