rails app-name
cd app-name

git init

touch .gitignore

edit your .gitignore to read:

log/*.log
tmp/**/*
.DS_Store
public/cache/**/*
public/uploaded_files
doc/api
doc/app
config/database.yml

touch log/.gitignore
touch tmp/.gitignore

cp config/database.yml config/database.yml.example

git add .

git rm public/index.html -f

git commit -v -a -m “initial commit”