Fix: Resolve permission issues with .storage directories

- Install su-exec in Dockerfile for user switching
- Modified start.sh to create directories as root, then change ownership
- Container starts as root but switches to nextjs user for app execution
- This prevents permission denied errors when creating .storage directories

Dockerfile

@@ -22,8 +22,8 @@ RUN pnpm build
 # Production stage
 FROM node:22-alpine AS production
 
-# Install pnpm
-RUN npm install -g pnpm ts-node
+# Install pnpm and su-exec
+RUN npm install -g pnpm ts-node && apk add --no-cache su-exec
 
 # Set working directory
 WORKDIR /app
@@ -53,9 +53,12 @@ RUN adduser -S nextjs -u 1001
 # Make start script executable
 RUN chmod +x /app/start.sh
 
-# Change ownership of the app directory
+# Change ownership of the app directory (but keep root for .storage)
 RUN chown -R nextjs:nodejs /app
-USER nextjs
+RUN chown root:root /app/.storage 2>/dev/null || true
+
+# Don't switch to nextjs user here - the start script will handle it
+# USER nextjs
 
 # Expose port
 EXPOSE 3000