Next.JS does NOT support Docker Swarm.

Link to the code that reproduces this issue

https://github.com/SanderCokart/sandercokart.com/tree/development

To Reproduce

docker service create and docker stack deploy both do launch the nodes and services but going to localhost:3000 results in nothing.

Current vs. Expected behavior

Going to localhost:3000 results in nothing.

Expected behavior: webpage shows up

Provide environment information

Operating System:
  Platform: win32
  Arch: x64
  Version: Windows 11 Pro
  Available memory (MB): 65268
  Available CPU cores: 16
Binaries:
  Node: 20.17.0
  npm: N/A
  Yarn: N/A
  pnpm: 9.11.0
Relevant Packages:
  next: 14.2.11 // An outdated version detected (latest is 15.0.1), upgrade is highly recommended!
  eslint-config-next: 14.2.11
  react: 18.3.1
  react-dom: 18.3.1
  typescript: 5.6.2
Next.js Config:
  output: standalone

Which area(s) are affected? (Select all that apply)

Output (export/standalone)

Which stage(s) are affected? (Select all that apply)

Other (Deployed)

Additional context

After a docker swarm init you can run docker service create -p 80:80 --replicas 1 --name nginx nginx and then visit localhost:80 (make sure to disable apache in wsl running sudo systemctl stop apache2.service in wsl terminal) you can see the nginx welcome page.

Using curl to go to localhost:3000 you get this:

curl: (52) Empty reply from server

Start with the linked sandercokart.com reproduction and its Next.js 14.2.11 standalone output configuration. Reproduce the deployment with docker service create and docker stack deploy, then compare the empty localhost:3000 response with the working nginx service and inspect the container behavior. Done means the deployed webpage loads through Docker Swarm instead of returning an empty reply.