To build the image run:
docker build -t transport_data_gouv_dev_database --build-arg BACKUP_PATH=<path_to_the_backup_file> .
Note: backup file needs to be in the directory.
If you want to push it to dockerhub (change the destination image name if needed):
docker login
docker tag transport_data_gouv_dev_database antoinede/transport_data_gouv_dev_database:latest
docker push antoinede/transport_data_gouv_dev_database:latest