mounting secrets including feature

src/test/configs/compose-Dockerfile-secrets/.devcontainer/Dockerfile

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+# Use a basic image
+FROM ubuntu:20.04
+
+# Install required utilities
+RUN apt-get update && apt-get install -y curl
+
+# Use the secret and set the environment variable
+RUN --mount=type=secret,id=some-secret \
+    echo "The secret is $SOME_SECRET" > /output.txt
+RUN export SOME_SECRET=$(cat /secret.txt) && \
+    echo "The secret is $SOME_SECRET" > /output.txt && \
+    echo "SOME_SECRET=$SOME_SECRET" >> /etc/environment
+
+	# Copy the rest of the application
+COPY . /app
+
+# Set the working directory
+WORKDIR /app
+
+# Expose port for application
+EXPOSE 80
+
+# Start the application (e.g., a simple HTTP server)
+CMD ["python3", "-m", "http.server", "80"]

src/test/configs/compose-Dockerfile-secrets/.devcontainer/devcontainer.json

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+{
+  "name": "My DevContainer",
+  "dockerComposeFile": [
+	 "./docker-compose.yml",
+ 	 "./docker-compose.override.yml"
+	],
+   "build": { 
+		"dockerfile": "Dockerfile",
+		"args": {
+	  		"DOCKER_BUILDKIT": "1"
+		}
+   },
+  "service": "my-service",
+  "features": {
+    "docker-in-docker": {
+		"version": "latest",
+        "installDockerBuildx": true
+	}
+  }
+}

src/test/configs/compose-Dockerfile-secrets/.devcontainer/docker-compose.override.yml

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+version: '3.8'
+
+services:
+  my-service:
+    build:
+      secrets:
+        - some-secret

src/test/configs/compose-Dockerfile-secrets/.devcontainer/docker-compose.yml

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+version: '3.8'
+
+services:
+  my-service:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    image: my-image
+    environment:
+      - MY-SECRET=${SOME_SECRET}
+    ports:
+      - "8080:80"
+
+secrets:
+  some-secret:
+    file: ./secret.txt
+

src/test/configs/compose-Dockerfile-secrets/.devcontainer/secret.txt

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+supersecretvalue