How to define build-args in docker-compose?

Question

I have the following docker-compose file

version: \'3\'
services:
    node1:
            build: node1
            image: node1
            container_name: n         


        

Answer 1

In your dockerfile:

ARG CERTBOT_TAG=latest
FROM certbot/certbot:${CERTBOT_TAG}

In your docker-compose.yml:

version: '3'
services:
  certbot-dns-namecheap:
    build:
       context: .
       args:                                                                     
         - CERTBOT_TAG=v0.40.1

And you can use @lvthillo solution with '--build-arg'