Add health checks and dependency conditions in docker-compose.yml

Introduced health checks for `netneutrality-db` to ensure proper readiness before dependent services start. Replaced static sleep in `startup.sh` with dynamic database availability checks, improving startup reliability and reducing downtime risks.

docker-compose.yml

@@ -13,6 +13,12 @@ services:
       - MYSQL_DATABASE=${MYSQL_DATABASE:-netneutrality}
       - MYSQL_ROOT_PASSWORD=${MYSQL_ROOT_PASSWORD:-password}
       - MARIADB_AUTO_UPGRADE=1
+    healthcheck:
+      test: ["CMD", "healthcheck.sh", "--connect", "--innodb_initialized"]
+      interval: 5s
+      timeout: 5s
+      retries: 20
+      start_period: 30s
 
   netneutrality-bot:
     image: gitea.bobert.me/anthorob/netneutrality:${NETNEUTRALITY_TAG:-latest}
@@ -22,8 +28,10 @@ services:
     networks:
       - netneutrality
     depends_on:
-      - netneutrality-db
-      - lavalink
+      netneutrality-db:
+        condition: service_healthy
+      lavalink:
+        condition: service_started
     volumes:
       - ./logs:/app/logs
     environment: