feat(pp-calculator): support other pp calculators (#57)

New configurations:

- CALCULATOR="rosu": specific pp calculator
- CALCULATOR_CONFIG='{}': argument passed through into calculator

docker-compose.yml

@@ -14,6 +14,8 @@ services:
       - MYSQL_HOST=mysql
       - MYSQL_PORT=3306
       - REDIS_URL=redis://redis:6379
+      # - CALCULATOR=performance_server
+      # - CALCULATOR_CONFIG='{"server_url":"http://performance-server:8080"}'
     env_file:
       - .env
     depends_on:
@@ -102,6 +104,15 @@ services:
       - osu-network
     command: redis-server --appendonly yes
 
+  # performance-server:
+  #   image: ghcr.io/googuteam/osu-performance-server:custom-rulesets
+  #   container_name: performance_server
+  #   environment:
+  #     - SAVE_BEATMAP_FILES=false
+  #   restart: unless-stopped
+  #   networks:
+  #     - osu-network
+
 volumes:
   mysql_data:
   redis_data: