diff --git a/pitch-deck/Dockerfile b/pitch-deck/Dockerfile
index 3c986ae..903b834 100644
--- a/pitch-deck/Dockerfile
+++ b/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 ./