Jenkinsfile.yml

---
- build:     # stage ('build') { ...
   
   # define the docker image used to run the build
   # an implicit volume for current project's git working copy is mounted
   image: maven:3.3-jdk-8

   # set environment variables, use $$ for credentials injection, as used by http://readme.drone.io/usage/secrets/
   environment:
      - foo: bar
      - nexus-password: $$nexus

   commands:
      - mvn install
      - touch hello.txt

   stash:
      war: target/*.war

   success: test        # default on success is to run next step sequentially  

   failure: jira     # equivalent to try .. catch. Can be either a list of commands, or a stage name (aka `goto`)

   defer:              # equivalent to try .. finally. inspired by go `defer`.
      - some_cleanup.sh


# create jira issue on build failure
- jira: 
   #TODO

   
- test:
   image: maven:3.3-jdk-8

   compose:
      database:
         image: mysql
         environment:
            - MYSQL_ROOT_PASSWORD=foo
      selenium:
         image: selenium/firefox-standalone


   commands:
      - acceptance_tests.sh


notify:
   slack: # here come plugins
      channel: dev

...