Deploy and update Docker Swarm stacks via Portainer API

fork from https://salcedo.dev/salcedo/drone-portainer

docker build -t drone-portainer .

kind: pipeline
name: default

steps:
- name: deploy
  image: drone-portainer
  settings:
    url: https://portainer.example.org
    stack: example
    repo:
      from_secret: DOCKER_REPO
    username:
      from_secret: portainer_username
    password:
      from_secret: portainer_password
    environment:
      VAR1: value
      VAR2: value

url URL of Portainer server

stack Name of stack to create or update

username Portainer username

repo docker image repo with registry

password Portainer password

endpoint Endpoint name. Defaults to primary

stackfile Stackfile path. Defaults to docker-stack.yml

environment Environment variables