Remove VOLUME declaration for better container platform compatibility

Some container platforms require volumes to be configured via their platform
rather than Dockerfile VOLUME declarations. The /data directory setup remains
for proper permission handling when volumes are mounted.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: Chris Nuzum

Dockerfile

@@ -27,8 +27,7 @@ RUN chmod +x /usr/local/bin/docker-entrypoint.sh
 # Create /data directory as root and set ownership to node user
 RUN mkdir -p /data && chown node:node /data
 
-# Declare volume for external mounting
-VOLUME ["/data"]
+# Note: Railway volumes are configured via Railway dashboard, not Dockerfile VOLUME
 
 EXPOSE 3001