Mount single file in docker

We can use –mount type=bind parameter to mount single file

docker run  -d -p 9090:9090 --mount type=bind,source=/opt/prometheus/prometheus.yml,target=/etc/prometheus/prometheus.yml prom/prometheus:v2.22.0

Using docker-compose file

version: "3.7"    
services:
  prometheus:
    image: prom/prometheus:v2.22.0
    volumes:
      - type: bind
        source: /opt/prometheus/prometheus.yml
        target: /etc/prometheus/prometheus.yml
    ports:
      - 9090:9090   

More : https://stackoverflow.com/questions/42248198/how-to-mount-a-single-file-in-a-volume

https://docs.docker.com/storage/bind-mounts/