chore(*): add missing mailer from config to dev playground

Dockerfile

-FROM node:18
+FROM node:16
 
 RUN apt-get update \ 
     && apt-get upgrade -y \

dev/config/default.js

@@ -21,4 +21,7 @@ module.exports = {
   authsome: {
     mode: path.join(__dirname, 'authsome.js'),
   },
+  mailer: {
+    from: '',
+  },
 }