refactor: restore root layout and split mysql config

docker-compose.test.yml

@@ -0,0 +1,35 @@
+services:
+  mysql:
+    image: mysql:8.4
+    container_name: mobilemodels-mysql
+    command:
+      - --character-set-server=utf8mb4
+      - --collation-server=utf8mb4_0900_ai_ci
+    environment:
+      MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD:-mobilemodels_root}
+      MYSQL_DATABASE: ${MYSQL_DATABASE:-mobilemodels}
+    ports:
+      - "3306:3306"
+    volumes:
+      - mobilemodels_mysql_data:/var/lib/mysql
+    healthcheck:
+      test: ["CMD-SHELL", "mysqladmin ping -h127.0.0.1 -uroot -p$$MYSQL_ROOT_PASSWORD --silent"]
+      interval: 5s
+      timeout: 5s
+      retries: 30
+      start_period: 20s
+    restart: unless-stopped
+    init: true
+
+  mobilemodels:
+    environment:
+      MYSQL_HOST: mysql
+      MYSQL_PORT: 3306
+      MYSQL_ROOT_USER: root
+      MYSQL_AUTO_LOAD: 1
+    depends_on:
+      mysql:
+        condition: service_healthy
+
+volumes:
+  mobilemodels_mysql_data: