docker-compose setup for Jenkins with python3

docker-compose.yml

version: '3.7'
services:
  jenkins:
    build:
      context: ./
      dockerfile: Dockerfile
    privileged: true
    user: root
    ports:
      - 8081:8080
      - 50000:50000
    container_name: jenkins
    volumes:
      - jenkins_home:/var/jenkins_home
      - /var/run/docker.sock:/var/run/docker.sock
      - /usr/local/bin/docker:/usr/local/bin/docker

Dockerfile

FROM jenkins/jenkins:lts-alpine
USER root
RUN apk add --no-cache python3
RUN python3 -m ensurepip
RUN python3 -m pip install --upgrade pip
RUN if [ ! -e /usr/bin/pip ]; then ln -s pip3 /usr/bin/pip ; fi
RUN if [[ ! -e /usr/bin/python ]]; then ln -sf /usr/bin/python3 /usr/bin/python; fi
RUN rm -r /root/.cache
RUN apk add pkgconf
RUN apk add build-base
RUN apk add python3-dev