Docker上のJenkinsからcontainer上でのテストを行う

docker-compose.yml

version: "3.7"
services: 
    jenkins:
        image: jenkinsci/blueocean:latest
        user: root
        volumes: 
            - ./jenkins-data:/var/jenkins_home
            - /var/run/docker.sock:/var/run/docker.sock
        environment: 
            - JENKINS_OPTS="--prefix=/jenkins"
        ports: 
            - 8080:8080
            - 50000:50000
    gitea:
        image: gitea/gitea:latest
        ports: 
            - 3000:3000
        environment: 
            - DISABLE_SSH=false
            

Jenkinsfile

pipeline {
    agent { docker 'python:3.6' }
    stages {
        stage('setup') {
            steps {
                sh 'pip install mkdocs'
            }
        }
        stage('build') {
            steps {
                sh 'mkdocs build'
            }
        }
    }
}