Update Dockerfile

Dockerfile

@@ -31,10 +31,14 @@ RUN apt-get update -qq && \
     rm -rf /var/lib/apt/lists/*
 
 # Create a non-root user for running podman rootlessly
-RUN useradd -m -s /bin/bash vmuser && \
+RUN useradd -m -s /bin/bash -u 1000 vmuser && \
     usermod -aG sudo vmuser && \
     echo "vmuser ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers
 
+# Set up subuid/subgid for rootless podman
+RUN echo "vmuser:100000:65536" >> /etc/subuid && \
+    echo "vmuser:100000:65536" >> /etc/subgid
+
 # Configure podman for rootless operation
 USER vmuser
 WORKDIR /home/vmuser