fix(pitch-deck): pre-create /data/dataroom owned by nextjs in Dockerfile

Docker volume inherits directory ownership from the image on first mount.
Without this, the volume mounts as root and the nextjs (uid 1001) process
gets EACCES when trying to write dataroom uploads.

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

pitch-deck/Dockerfile

@@ -31,6 +31,10 @@ ENV NODE_ENV=production
 RUN addgroup --system --gid 1001 nodejs
 RUN adduser --system --uid 1001 nextjs
 
+# Create dataroom storage directory owned by nextjs so mounted volumes
+# inherit the correct ownership on first initialisation
+RUN mkdir -p /data/dataroom && chown -R nextjs:nodejs /data/dataroom
+
 # Copy built assets
 COPY --from=builder --chown=nextjs:nodejs /app/public ./public
 COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./