chore(explorer): enable CORS for /api endpoints (#1800)

Author: JuArce

explorer/lib/explorer_web/router.ex

@@ -29,6 +29,7 @@ defmodule ExplorerWeb.Router do
   end
 
   pipeline :api do
+    plug CORSPlug, origin: "*"
     plug :accepts, ["json"]
   end
 

explorer/mix.exs

@@ -62,7 +62,8 @@ defmodule Explorer.MixProject do
       {:postgrex, ">= 0.0.0"},
       {:cachex, "~> 3.6"},
       {:mutex, "~> 2.0"},
-      {:tails, "~> 0.1.5"}
+      {:tails, "~> 0.1.5"},
+      {:cors_plug, "~> 3.0"},
     ]
   end