Complete SonarQube with reverse proxy

.env

# SSL Certificates
DOMAIN=example.copm # Set this to the domain you want a certificate for, sonar will be available at it on /sonar
EMAIL=sonar@example.com # Need a valid email for the certificate generation 

# Directories
USERDIR=/${HOME}/docker # Change this to where you'd like to store SonarQube configuration on your host machine

# Sonar
SONAR_DATABASE_USER=sonar # Make sure to change this
SONAR_DATABASE_PASSWORD=sonar # Make sure to change this

docker-compose.yml

version: "3"
services:

  traefik:
    container_name: traefik
    image: traefik:v2.2
    restart: unless-stopped
    command:
      - --api
      - --providers.docker
      - --entrypoints.web.address=:80
      - --entrypoints.web.http.redirections.entryPoint.to=websecure
      - --entrypoints.web.http.redirections.entryPoint.scheme=https
      - --entrypoints.web.http.redirections.entrypoint.permanent=true
      - --entrypoints.websecure.address=:443
      - --certificatesresolvers.leresolver.acme.caserver=https://acme-v02.api.letsencrypt.org/directory
      - --certificatesresolvers.leresolver.acme.email=${EMAIL}
      - --certificatesresolvers.leresolver.acme.storage=/app/acme.json
      - --certificatesresolvers.leresolver.acme.tlschallenge=true
    ports:
      - 80:80
      - 443:443
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - ${USERDIR}/traefik:/app
    logging:
      options:
        max-size: "2m"
          max-file: "5"
  
  sonarqube:
    container_name: sonarqube
    image: sonarqube:latest
    restart: unless-stopped
    cpus: 0.5
    mem_limit: 4096M
    mem_reservation: 1024M
    environment:
      - SONAR_JDBC_URL=jdbc:postgresql://sonarqube-postgres:5432/sonar
      - SONAR_JDBC_USERNAME=${SONAR_DATABASE_USER}
      - SONAR_JDBC_PASSWORD=${SONAR_DATABASE_PASSWORD}
      - SONAR_WEB_CONTEXT=/sonar
    volumes:
      - ${USERDIR}/sonarqube/conf:/opt/sonarqube/conf
      - ${USERDIR}/sonarqube/data:/opt/sonarqube/data
      - ${USERDIR}/sonarqube/extensions:/opt/sonarqube/extensions
      - ${USERDIR}/sonarqube/bundled-plugins:/opt/sonarqube/lib/bundled-plugins
    depends_on:
      - traefik
      - sonarqube-postgres
    logging:
      options:
        max-size: "2m"
        max-file: "5"
    labels:
      - "traefik.http.routers.sonarqube.rule=Host(`${DOMAIN}`) && PathPrefix(`/sonar`)"
      - "traefik.http.routers.sonarqube.tls=true"

  sonarqube-postgres:
    container_name: sonarqube-postgres
    image: postgres
    restart: unless-stopped
    environment:
      - POSTGRES_USER=${SONAR_DATABASE_USER}
      - POSTGRES_PASSWORD=${SONAR_DATABASE_PASSWORD}
    volumes:
      - postgresql:/var/lib/postgresql
      - postgresql_data:/var/lib/postgresql/data
    labels:
      - traefik.enable=false
    ulimits:
      nofile:
        soft: 65536
        hard: 65536

volumes:
  postgresql:
  postgresql_data: