feat: Overhauled base template

.env.example

@@ -1,13 +1,17 @@
 # Application settings
-APP_PORT=
-APP_ENVIRONMENT=dev
+APP_PORT=8080
+# Environments - dev, prod
+APP_ENVIRONMENT=prod
 
 # Database settings
 DB_HOST=
 DB_PORT=3306
+DB_NAME=
 DB_USER=
 DB_PASS=
-DB_NAME=
+# This field is optional - if not supplied, it will be built from the above fields.
+# If you need the string to be a specific format, you may override it with this field.
+DB_URL=
 
 # Security settings
 SESSION_SECRET=