Consegui avançar um passo, encontrando os arquivos de compose executando o comando:
# git checkout deploy-docker
Porém, ao tentar executar o docker-compose run aparece esse erro:
Starting livredoc_livredoc_db_1 ... done
Starting livredoc_livredoc_redis_1 ... done
could not translate host name "livredoc_db" to address: Name or service not known
Couldn't create database for {"adapter"=>"postgresql", "encoding"=>"unicode",
"pool"=>5, "host"=>"livredoc_db", "user"=>"postgres",
"database"=>"livredoc_development"}
rake aborted!
PG::ConnectionBad: could not translate host name "livredoc_db" to address: Name
or service not known
.....