feat: add version info endpoint and display in UI

Dockerfile

@@ -52,6 +52,12 @@ HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
 ENV NODE_ENV=production \
     PORT=3000
 
+# Build arguments for version info
+ARG COMMIT_HASH=unknown
+ARG BUILD_DATE=unknown
+ENV COMMIT_HASH=${COMMIT_HASH}
+ENV BUILD_DATE=${BUILD_DATE}
+
 # Use dumb-init to handle signals properly
 ENTRYPOINT ["dumb-init", "--"]