[Rocky] clear the Procfile
[Rocky] add ruby version to Gemfile
delete comment
delete debug point
calculate everyone's cost in one travel
code refactoring
add more seed
clear Procfile
clear Procfile
Change seed
Change seed
Change seed
Change seed
Change seed
Change seed
Change seed
Change seed
user can only see the travels which they are joined in
calculate for every member, and show the result
code refacotring