Pre-Requisites:
- Brew
- Erlang
- Database Engine (CloudSQL, Postgres, MySQL, . . . )

Install Elixir:

brew install elixir

Create new project:

mix phx.new <project_name>

phx.new - pre-bakes Phoenix into the Elixir project.
mix new - will only create an Elixir project without Phoenix.
This will create an elixir project in the current directory with the given name <project_name>

Fetch Dependencies:

cd <project_name>
mix deps.get

Configure Database (in config/dev.exs):
- config/dev.exs for Development environment
- config/prod.exs for Production environment

mix ecto.create

Start Phoenix app:

mix phx.server

Running your app inside IEx (Interactive Elixir):

iex -S mix phx.server