Create start.sh

start.sh

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+#!/bin/sh
+
+# Start the rootless Docker daemon in the background
+# The `docker:dind-rootless` image's ENTRYPOINT is already `dockerd-rootless.sh`.
+# We need to ensure it runs as the primary process, and then our commands follow.
+# The `dind-rootless` image sets up the environment variables for rootless mode.
+# We'll run dockerd directly and wait for it.
+
+echo "Starting dockerd-rootless.sh in the background..."
+dockerd-rootless.sh &
+
+# Wait for the Docker daemon to be fully ready
+# This loop is more robust than a fixed sleep
+until docker info >/dev/null 2>&1; do
+    echo 'Waiting for Docker daemon to start...'
+    sleep 1
+done
+echo 'Docker daemon is up and running!'
+
+# Build the Nginx image using the copied exdocker Dockerfile
+echo "Building my-nginx-app image..."
+docker build -f exdocker -t my-nginx-app .
+
+# Run the Nginx container in detached mode, mapping its port 80
+# to port 8080 *inside this DinD container*.
+echo "Running my-inner-nginx container..."
+docker run -d -p 8080:80 --name my-inner-nginx my-nginx-app
+
+echo 'Inner Nginx container started. Testing accessibility...'
+
+# Test accessibility of the inner Nginx server
+curl http://localhost:8080
+
+# Keep this DinD container running indefinitely
+echo "DinD container is running. Access Nginx at http://localhost:8080 (from host)."
+wait # Wait for background processes (like dockerd) to finish, keeping the container alive