Add instructions to .env-example

.env-example

@@ -1,10 +1,15 @@
+# This is an example configuration for the .env file
+# You need to create the .env file yourself
+# For more information check out this page:
+# https://github.com/riggraz/astuto/wiki/Required-environment-variables
+
 ENVIRONMENT=production
 SECRET_KEY_BASE=secretkeybasehere
 
 POSTGRES_USER=yourusernamehere
 POSTGRES_PASSWORD=yourpasswordhere
 
-APP_NAME="You App Name Here"
+APP_NAME=You App Name Here
 SHOW_LOGO=yes
 POSTS_PER_PAGE=15