Noob installation

[daniagongora]

Hello, I want to try cuttlefish but I have issues with docker, specifically with rails the /app/log/development.log never was made so i made it "manually" with
web: build: context: . dockerfile: dockerfiles/web volumes: - .:/app:cached - /app/log # The new line ports: - "3000:3000" links: - db - redis - smtp
In the .yml, I change permissions but I still with issues with the installation (I'm not finished), can you make a more detailed explanation of installation with docker?