I used Traccar before switching to FMD. It used a lot of battery for somewhat inaccurate results in my case (might be phone related).

You need to install the client from F-Droid and it periodically polls your device for its location.

the only change I had to make was to add the config file to the volumes list:

services:
  fmd-server:
    image: registry.gitlab.com/nulide/findmydeviceserver:v0.7.0
    container_name: fmd-server
    volumes:
      - data:/data
      - ./fmd/data:/fmd/db/
      - ./fmd/config/config.yml:/fmd/config.yml:ro
    restart: unless-stopped
    networks:
      - fmd_server
#    ports:
#      - 8080:8080

# legacy
volumes:
  data:

networks:
  fmd_server:

https://gitlab.com/Nulide/findmydeviceserver, a FOSS and self-hosted alternative to location history. Particularly useful for finding my device which has no Google services on it.