Removed specifying host port of 80 in case there are multiple web projects
- can use fig port web 3000 to find the host port allocated by fig
Reuse official rails image
Merge pull request #1 from zhao-li/feature/update_ports

Removed specifying host port of 80 in case there are multiple web projec...
Merge pull request #2 from zhao-li/feature/use_official_rails_image

Reuse official rails image