Synology: Port Binding Issue

[seanoc86]

I'm having some trouble hosting Fizzy in Docker set up on Synology platform. I get the following error after starting the container.

{"time":"2026-01-28T15:38:11.462275302Z","level":"ERROR","msg":"Failed to start HTTP listener","error":"listen tcp :80: bind: permission denied"}

I haven't had trouble with other containers that are exposing port 80.

Compose example:

`services:
  fizzy:
    image: ghcr.io/basecamp/fizzy:main
    # restart: always
    ports:
        - 4587:80
      
 volumes:
      - [my volume]:/rails/storage
    environment: 
  

      SECRET_KEY_BASE: [added secret key]
      BASE_URL:  [added base url
      MAILER_FROM_ADDRESS: [added mailer address]
      SMTP_ADDRESS: [added]
      SMTP_USERNAME:  [added]
      SMTP_PASSWORD:  [added]

volumes:
  fizzy:`

[seanoc86]

Typical that I found the solution just after I finally asked for help. Fix was to use Thruster's HTTP_PORT environment variable.

  ports:
      - "8080:8080"
    environment:
      - HTTP_PORT=8080

Thanks to this conversation for steering me in the right direction: #2254