Lambda + API Gateway FAQ

Can I use my own Dockerfile?

Yes. Add a dockerfile field to your service in code.json:

{
  "name": "my_service",
  "location": "orig/my_service",
  "dockerfile": "orig/my_service/Dockerfile"
}

What your Dockerfile receives

Nar passes these build arguments:

Argument	Description
API_NAME	The service name (e.g., auth)
SHARED_DIRS	Comma-separated shared library names (e.g., common)

When to use a custom Dockerfile

• Different language (Node.js, Go, Rust, etc.)
• Different Python version
• System dependencies (ffmpeg, imagemagick, etc.)

See the default Dockerfile for reference.