[Unit]
Documentation=https://www.docker.com/blog/how-to-use-the-official-nginx-docker-image/
Requires=docker.service
After=docker.service

[Install]
WantedBy=multi-user.target

[Service]
ExecStartPre=docker pull nginx
ExecStartPre=-docker stop nginx
ExecStartPre=-docker rm nginx
ExecStart=docker run --name nginx \
    --add-host=host.docker.internal:host-gateway \
    -p 443:443 \
    -v /root/nginx/cert.pem:/etc/ssl/certs/cert.pem:ro \
    -v /root/nginx/key.pem:/etc/ssl/private/key.pem:ro \
    -v /root/nginx/conf.d:/etc/nginx/conf.d:ro \
    --log-opt max-size=1g \
    nginx
ExecReload=docker exec nginx nginx -s reload