add release note

releases/2.0.0+23.0.3-fpm

@@ -0,0 +1,7 @@
+The 2.0.0 release moves the database service to a seperate override.yml file to support different database types (mariadb / postgres).
+Please add the following snippet to your config .env to ensure mariadb is used:
+
+```
+COMPOSE_FILE="compose.yml"
+COMPOSE_FILE="$COMPOSE_FILE:compose.mariadb.yml"
+```