docker-compose build
docker-compose up -d
docker exec -it redisflaskslashcommand_redis_1 redis-cli
ping
> PONG
set mykey somevalue
> OK
get mykey
> "somevalue"
exit
docker-compose down
docker container rm redisflaskslashcommand_redis_1
docker container rm redisflaskslashcommand_app_1
docker image ls
docker image rm redis:3.2-alpine
docker image rm python:3.6-alpine