Adapted Kiwix Serve Dockerfile for rootless Docker support

docker/server/Dockerfile

@@ -2,7 +2,7 @@ ARG VERSION=latest
 
 # kiwix-tools is multi-arch
 FROM ghcr.io/kiwix/kiwix-tools:$VERSION
-LABEL org.opencontainers.image.source https://github.com/openzim/kiwix-tools
+LABEL org.opencontainers.image.source=https://github.com/openzim/kiwix-tools
 
 # expose kiwix-serve default port and workdir
 EXPOSE 8080
@@ -11,4 +11,11 @@ WORKDIR /data
 
 COPY ./start.sh /usr/local/bin/
 
+# Create non-root user for better security
+RUN addgroup -S kiwix && adduser -S kiwix -G kiwix
+# Change ownership of the start script to the new user
+RUN chown kiwix:kiwix /usr/local/bin/start.sh
+# Switch to the non-root user
+USER kiwix
+
 ENTRYPOINT ["/usr/bin/dumb-init", "--", "/usr/local/bin/start.sh"]