Chown data.db to astro user to fix readonly database error

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Dockerfile

@@ -31,6 +31,8 @@ COPY --from=builder /app/node_modules ./node_modules
 COPY --from=builder /app/dist ./dist
 COPY --from=builder /app/data.db ./data.db
 
+RUN chown astro:astro /app/data.db
+
 EXPOSE 4321
 
 CMD ["node", "./dist/server/entry.mjs"]