feat: Add custom location block to virtual paths

This features allows the custom location blocks to be added to the
virtual path based routing. The custom config can be specified for each
container individually.

test/test_virtual-path/alternate.conf

@@ -0,0 +1 @@
+rewrite ^/(web3|alt)/(.*) /$2 break;

test/test_virtual-path/bar.conf

@@ -0,0 +1 @@
+add_header  X-test  bar;

test/test_virtual-path/foo.conf

@@ -0,0 +1 @@
+add_header  X-test  f00;

test/test_virtual-path/test_custom_conf.py

@@ -4,3 +4,35 @@ def test_default_root_response(docker_compose, nginxproxy):
     r = nginxproxy.get("http://nginx-proxy.test/")
     assert r.status_code == 418
 
+@pytest.mark.parametrize("stub,header", [
+    ("nginx-proxy.test/web1", "bar"),
+    ("foo.nginx-proxy.test", "f00"),
+])
+def test_custom_applies(docker_compose, nginxproxy, stub, header):
+    r = nginxproxy.get(f"http://{stub}/port")
+    assert r.status_code == 200
+    assert "X-test" in r.headers
+    assert header == r.headers["X-test"]
+
+@pytest.mark.parametrize("stub,code", [
+    ("nginx-proxy.test/foo", 418),
+    ("nginx-proxy.test/web2", 200),
+    ("nginx-proxy.test/web3", 200),
+    ("bar.nginx-proxy.test", 503),
+])
+def test_custom_does_not_apply(docker_compose, nginxproxy, stub, code):
+    r = nginxproxy.get(f"http://{stub}/port")
+    assert r.status_code == code
+    assert "X-test" not in r.headers
+
+@pytest.mark.parametrize("stub,port", [
+    ("nginx-proxy.test/web1", 81),
+    ("nginx-proxy.test/web2", 82),
+    ("nginx-proxy.test/web3", 83),
+    ("nginx-proxy.test/alt", 83),
+])
+def test_alternate(docker_compose, nginxproxy, stub, port):
+    r = nginxproxy.get(f"http://{stub}/port")
+    assert r.status_code == 200
+    assert r.text == f"answer from port {port}\n"
+

test/test_virtual-path/test_custom_conf.yml

@@ -1,3 +1,12 @@
+
+foo:
+  image: web
+  expose:
+    - "42"
+  environment:
+    WEB_PORTS: "42"
+    VIRTUAL_HOST: "foo.nginx-proxy.test"
+
 web1:
   image: web
   expose:
@@ -18,6 +27,15 @@ web2:
     VIRTUAL_PATH: "/web2/"
     VIRTUAL_DEST: "/"
 
+web3:
+  image: web
+  expose:
+    - "83"
+  environment:
+    WEB_PORTS: "83"
+    VIRTUAL_HOST: "nginx-proxy.test"
+    VIRTUAL_PATH: "~ ^/(web3|alt)/"
+
 sut:
   image: nginxproxy/nginx-proxy:test
   environment:
@@ -25,3 +43,7 @@ sut:
   volumes:
     - /var/run/docker.sock:/tmp/docker.sock:ro
     - ../lib/ssl/dhparam.pem:/etc/nginx/dhparam/dhparam.pem:ro
+    - ./foo.conf:/etc/nginx/vhost.d/foo.nginx-proxy.test:ro
+    - ./bar.conf:/etc/nginx/vhost.d/nginx-proxy.test_918d687a929083edd0c7224ee2293e0e7c062ab4_location:ro
+    - ./alternate.conf:/etc/nginx/vhost.d/nginx-proxy.test_7fb22b74bbdf907425dbbad18e4462565cada230_location:ro
+