add env example

env.example

@@ -0,0 +1,6 @@
+DB_HOST=localhost
+DB_PORT=3306
+DB_DATABASE=maa
+DB_USERNAME=
+DB_PASSWORD=
+JWT_SECRET=Tdrd2mgJCzhpmJKgyDVMzU93IxX3K9RDuzBddgZJ0N4aXLNHobPdox7Y36BpzyYY