fix: add data directory with permissions for zine storage

Create /app/data/zines directory in Dockerfile with nextjs user ownership
to fix EACCES permission denied error. Add persistent volume mount in
docker-compose.yml to preserve zine data across container restarts.

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Dockerfile

@@ -38,6 +38,9 @@ COPY --from=builder /app/public ./public
 COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
 COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
 
+# Create data directory for zine storage with proper permissions
+RUN mkdir -p /app/data/zines && chown -R nextjs:nodejs /app/data
+
 USER nextjs
 
 EXPOSE 3000

docker-compose.yml

@@ -10,6 +10,8 @@ services:
       - NODE_ENV=production
       - HOSTNAME=0.0.0.0
       - PORT=3000
+    volumes:
+      - zine-data:/app/data
     networks:
       - mycofi-network
       - traefik-public
@@ -20,6 +22,10 @@ services:
       - "traefik.http.services.mycofi.loadbalancer.server.port=3000"
       - "traefik.docker.network=traefik-public"
 
+volumes:
+  zine-data:
+    driver: local
+
 networks:
   mycofi-network:
     driver: bridge