Don't require ADMIN_EMAIL

.github/workflows/ci.yml

@@ -58,7 +58,6 @@ jobs:
   unit-test:
     runs-on: ubuntu-18.04
     env:
-      ADMIN_EMAIL: firezone@localhost
       MIX_ENV: test
       POSTGRES_HOST: localhost
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

apps/fz_http/priv/repo/migrations/20211221183311_add_role_to_users.exs

@@ -14,7 +14,10 @@ defmodule FzHttp.Repo.Migrations.AddRoleToUsers do
     # Make existing admin the admin if exists. Admin is most likely the first created user.
     flush()
 
-    admin_email = System.fetch_env!("ADMIN_EMAIL")
-    execute "UPDATE users SET role = 'admin' WHERE email = '#{admin_email}'"
+    admin_email = System.get_env("ADMIN_EMAIL")
+
+    if admin_email do
+      execute "UPDATE users SET role = 'admin' WHERE email = '#{admin_email}'"
+    end
   end
 end