welcome to the forum.
in the folder, where your docker-compose.yml file is stored you have to create some subfolders:
./deployment/map/
there you store the mapdata.mbtiles and create mapsettings.json based on:
in the mapsettings.json you can customize your bounds and where the map is centered at opening.
bound tool: OSM - Tile Calculator
don’t forget to swap the longtitude and latitude in mapsettings.json too.
"center": [ longitude, latitude],
let us know, if you get stuck or you achieved it 