Add route for /v1 path

At some point there will be an update to nginx that no longer strips the
`/v1` from the path. When this happens, having this mount point in place
will allow the fall through to the Catalyst app to continue.

This fixes an issue where the Mojolicous application is unable to
validate the specification for OpenAPI because the defined base path
does not exist.

Author: ssoriche

lib/MetaCPAN/API.pm

@@ -145,6 +145,20 @@ sub _set_up_routes {
     $self->plugin( 'Minion::Admin' => { route => $admin->any('/minion') } );
     $self->plugin(
         'OpenAPI' => { url => $self->home->rel_file('root/static/v1.yml') } );
+
+# This route is for when nginx gets updated to no longer strip the `/v1` path.
+# By retaining the `/v1` path the OpenAPI spec is picked up and passed
+# through Mojolicous.  The `rewrite` parameter is stripping the `/v1` before
+# it is passed to Catalyst allowing the previous logic to be followed.
+    $self->plugin(
+        MountPSGI => {
+            '/v1'   => $self->home->child('app.psgi')->to_string,
+            rewrite => 1
+        }
+    );
+
+# XXX Catch cases when `v1` has been stripped by nginx until migration is complete
+# XXX then this path can be removed.
     $self->plugin(
         MountPSGI => { '/' => $self->home->child('app.psgi')->to_string } );