Run as root in dev mode for file write permissions

Dockerfile

@@ -36,9 +36,10 @@ RUN addgroup --system --gid 1001 nodejs
 RUN adduser --system --uid 1001 nextjs
 
 # Copy all files from builder
-COPY --from=builder --chown=nextjs:nodejs /app ./
+COPY --from=builder /app ./
 
-USER nextjs
+# Don't switch to nextjs user for dev mode - needs write permissions
+# USER nextjs
 
 EXPOSE 3000