Merge branch 'service-worker-allowed-header' into 'develop'

Ability to set custom HTTP headers per each frontend

See merge request pleroma/pleroma!3247

test/pleroma/web/plugs/http_security_plug_test.exs

@@ -72,6 +72,21 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlugTest do
       assert csp =~ "media-src 'self' https:;"
       assert csp =~ "img-src 'self' data: blob: https:;"
     end
+
+    test "it sets the Service-Worker-Allowed header", %{conn: conn} do
+      clear_config([:http_security, :enabled], true)
+      clear_config([:frontends, :primary], %{"name" => "fedi-fe", "ref" => "develop"})
+
+      clear_config([:frontends, :available], %{
+        "fedi-fe" => %{
+          "name" => "fedi-fe",
+          "custom-http-headers" => [{"service-worker-allowed", "/"}]
+        }
+      })
+
+      conn = get(conn, "/api/v1/instance")
+      assert Conn.get_resp_header(conn, "service-worker-allowed") == ["/"]
+    end
   end
 
   describe "img-src and media-src" do