use volume for aplication data and logs by default

docker-compose.yml

@@ -9,5 +9,7 @@ services:
     ports:
       - "8080:8080"
     volumes:
-      - ./data:/app/data
+      - inviter:/app
-    environment: []
+
+volumes:
+  inviter:

docker-composer.override.example.yml

@@ -0,0 +1,6 @@
+services:
+  inviter:
+    ports:
+      - "8080:8080"
+    environment:
+      DISCORD_TOKEN: "your_discord_token_here"