Revert "Change database.yml"

This reverts commit 3dfc42ed433c46f66233b0f16250594a6a6f1fc4.
Revert "bundle updating sqlite3"

This reverts commit 383900e219d9a317c9d7e10ebd7901cb1b6377e3.
Revert "Add heroku gem"

This reverts commit 0dfb1d1e168d26a51f89e9f7f99a83c379270322.
Gemfile