Update Dockerfile

Dockerfile

@@ -4,13 +4,18 @@ FROM docker:dind-rootless
 # Set the working directory inside the container
 WORKDIR /app
 
-# Copy the Nginx app's index.html and its Dockerfile (now named exdocker) into this container
+# Copy the Nginx app's index.html and its Dockerfile (exdocker) into this container
 COPY index.html ./
 COPY exdocker ./
 
-# Install curl to test the inner Nginx server
+# Switch to root user to install curl, as apk requires root privileges
+USER root
 RUN apk add --no-cache curl
 
+# Switch back to the default non-root user for dind-rootless (usually 'docker')
+# This is important for security and proper operation of the rootless daemon
+USER docker
+
 # Expose a port from this DinD container.
 # We'll map the inner Nginx container's port 80 to this port (e.g., 8080)
 # within the DinD container. Then, we can map this 8080 to the host.