Docker Compose: version is obsolete

Docker Compose: persist logs folder
pom.xml: add commons-io as dependency

docker-compose-webapp.yml

@@ -1,5 +1,3 @@
-version: '3.3'
-
 services:
   db:
     image: mariadb:10.7
@@ -40,6 +38,8 @@ services:
     depends_on:
       - db
       - bot
+    volumes:
+      - ./logs:/app/logs
     environment:
       DB_CONNECTION: 'mysql'
       DB_HOST: 'db'