update README for installing branch api_mode (WIP)

README.md

@@ -9,20 +9,31 @@
 ###### macOs
 ```shell
 brew update
-brew install ruby
+brew install rbenv ruby-build
+echo 'eval $(rbenv init -)' >> $HOME/.zshrc # assuming you're on zsh
+source ~/.zshrc
+brew install postgresql # for libpq-fe
+xcode-select --install # click, click, click
 ```
 
 #### Project Init
 ```shell
 git clone https://github.com/Tiqa/debats-api.git
+git checkout -b feat/api_mode origin/feat/api_mode
 cd debats-api
 gem install bundler
+gem install pg
+#gem install nokogiri
+bundler config build.nokogiri --use-system-libraries # macOS issue
 bundler install
-rails db:reset
+rails db:drop
+rails db:create
+rails db:migrate
+rails db:seed
 ```
 
 #### Launch server
 ```shell
-rails server
+rails server # /usr/local/bin/rails server (macOS)
 ```
 > server launched on port 3000