example update

config.default.yml

@@ -1,7 +1,14 @@
 providers:
   local:
     kind: docker
+    # for value format, see https://docs.docker.com/reference/cli/dockerd/
     value: FROM_ENV
+  remote1:
+    kind: docker
+    value: ssh://user@10.0.1.1
+  remote2:
+    kind: docker
+    value: tcp://10.0.1.1:2375
   # provider1:
   #   kind: file
   #   value: provider1.yml

providers.example.yml

@@ -1,4 +1,4 @@
-app: # alias
+app: # matching `app.y.z`
   # optional
   scheme: http
   # required, proxy target
@@ -11,3 +11,5 @@ app: # alias
   path_mode:
   # optional
   notlsverify: false
+# app2:
+#   ...