Make use of the read-only repo config for prod env (#3)

config/dev.exs

@@ -2,6 +2,9 @@ import Config
 
 # Development compile-time app env
 
+config :pathfinder,
+  read_only: :false
+
 config :pathfinder, Woody.Server,
   ip: "0.0.0.0",
   port: 8022

lib/newway/repo.ex

@@ -1,5 +1,8 @@
 defmodule NewWay.Repo do
+  @read_only Application.compile_env(:pathfinder, :read_only, :true)
+
   use Ecto.Repo,
     otp_app: :pathfinder,
-    adapter: Ecto.Adapters.Postgres
+    adapter: Ecto.Adapters.Postgres,
+    read_only: @read_only
 end

priv/repo/migrations/20200217115515_schema.exs

@@ -2,7 +2,7 @@ defmodule NewWay.Repo.Migrations.Schema do
   use Ecto.Migration
 
   def up do
-    execute "CREATE SCHEMA nw"
+    execute "CREATE SCHEMA IF NOT EXISTS nw"
   end
 
   def down do