Updated compose example assuming support of array of compose files

container-templates/docker-compose/.devcontainer/docker-compose.yml

@@ -8,7 +8,7 @@ services:
   your-service-name-here:
     build: 
       context: .
-      dockerfile: Dockerfile  # Using a Dockerfile is optional, but included for completeness.
+      dockerfile: .devcontainer/Dockerfile  # Using a Dockerfile is optional, but included for completeness.
 
     ports:
      - "3000:3000"  # Application port to forward

containers/docker-existing-docker-compose/.devcontainer/docker-compose.yml

@@ -3,16 +3,10 @@
 # Licensed under the MIT License. See LICENSE in the project root for license information.
 #-----------------------------------------------------------------------------------------
 
-version: '2.1'
+version: '3'
 services:
-  devcontainer:
-      extends: 
-        # Update this to the name of the service you want to work with in your docker-compose.yml file
-        service: your-service-name-here 
-
-        # Update this if you have Docker Compose file with a different name
-        file: docker-compose.yml
-
+  # Update this to the name of the service you want to work with in your docker-compose.yml file
+  your-service-name-here:
     volumes:
       # Update this to wherever you want VS Code to mount the folder of your project
       - .:/workspace

containers/docker-existing-docker-compose/.vscode/devContainer.json

@@ -1,12 +1,16 @@
 {
     "name": "Existing Docker Compose",
 
-    "// Most of the configuration is in this .devcontainer/docker-compose.yml file":"",
-    "dockerComposeFile": ".devcontainer/docker-compose.yml",
+    "// Update this list if you have more compose files or use different names. The": "",
+    "// .devcontainer/docker-compose.yml file contains any overrides you need/want to make.":"",
+    "dockerComposeFile": [
+        "docker-compose.yml",
+        ".devcontainer/docker-compose.yml"
+    ],
 
-    "// The service property is the name of the service that extends your existing service": "",
-    "// in .devcontainer/docker-compose.yml. Update the real service name and file path there.":"",
-    "service": "devcontainer", 
+    "// The service property is the name of the service for the container that VS Code should": "",
+    "// use. Update this value and .devcontainer/docker-compose.yml to the real service name.":"",
+    "service": "your-service-name-here", 
 
     "// The volume property is the path VS Code should open by default when connected to the service.": "",
     "// This is typically a file mount in .devcontainer/docker-compose.yml":"",