Improve database timeout handling and add local testing setup

- Update database timeout values for better Portainer/NFS compatibility
- Add .env-database-local for local testing with reduced resource requirements
- Create local data directories and backup script validation
- Split compose validation confirms proper service dependency configuration
- Increase MySQL health check timeouts: start_period 60s→120s, timeout 10s→15s
- Extend database wait times: retries 30→60, sleep 5→10 (total 150s→600s)

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.env-database

@@ -0,0 +1,98 @@
+# ==============================================
+# AZEROTHCORE DATABASE LAYER ENVIRONMENT
+# ==============================================
+# Environment variables for MySQL, database init, import, and backup
+
+# ==============================================
+# DATABASE CREDENTIALS (REQUIRED)
+# ==============================================
+MYSQL_ROOT_PASSWORD=azerothcore123
+
+# Database connection settings
+MYSQL_HOST=ac-mysql
+MYSQL_PORT=3306
+MYSQL_USER=root
+MYSQL_ROOT_HOST=%
+
+# Database names
+DB_AUTH_NAME=acore_auth
+DB_WORLD_NAME=acore_world
+DB_CHARACTERS_NAME=acore_characters
+
+# Database wait settings - Increased for Portainer/NFS deployments
+DB_WAIT_RETRIES=60
+DB_WAIT_SLEEP=10
+
+# ==============================================
+# DOCKER IMAGES (REQUIRED)
+# ==============================================
+# Database layer images
+AC_DB_IMPORT_IMAGE=acore/ac-wotlk-db-import:14.0.0-dev
+MYSQL_IMAGE=mysql:8.0
+ALPINE_IMAGE=alpine:latest
+
+# ==============================================
+# IMAGE PULL POLICY (REQUIRED)
+# ==============================================
+IMAGE_PULL_POLICY=if_not_present
+
+# ==============================================
+# MYSQL CONFIGURATION (REQUIRED)
+# ==============================================
+# MySQL server settings
+MYSQL_CHARACTER_SET=utf8mb4
+MYSQL_COLLATION=utf8mb4_unicode_ci
+MYSQL_MAX_CONNECTIONS=1000
+MYSQL_INNODB_BUFFER_POOL_SIZE=256M
+MYSQL_INNODB_LOG_FILE_SIZE=64M
+
+# MySQL health check settings - Moderately increased for Portainer/NFS deployments
+MYSQL_HEALTHCHECK_INTERVAL=20s
+MYSQL_HEALTHCHECK_TIMEOUT=15s
+MYSQL_HEALTHCHECK_RETRIES=25
+MYSQL_HEALTHCHECK_START_PERIOD=120s
+
+# ==============================================
+# NETWORK CONFIGURATION (REQUIRED)
+# ==============================================
+# External database port
+DOCKER_DB_EXTERNAL_PORT=64306
+
+# ==============================================
+# DEPLOYMENT CONFIGURATION (REQUIRED)
+# ==============================================
+# Storage configuration for Portainer NFS deployments
+STORAGE_PATH=/nfs/containers/azerothcore
+
+# ==============================================
+# CONTAINER NAMES (REQUIRED)
+# ==============================================
+# Database layer container names
+CONTAINER_MYSQL=ac-mysql
+CONTAINER_DB_INIT=ac-db-init
+CONTAINER_DB_IMPORT=ac-db-import
+CONTAINER_BACKUP=ac-backup
+
+# ==============================================
+# NETWORK SETTINGS (REQUIRED)
+# ==============================================
+NETWORK_NAME=azerothcore
+NETWORK_SUBNET=172.20.0.0/16
+NETWORK_GATEWAY=172.20.0.1
+
+# ==============================================
+# BACKUP CONFIGURATION (REQUIRED)
+# ==============================================
+# Host volume paths for backup
+HOST_BACKUP_PATH=./backups
+HOST_BACKUP_SCRIPTS_PATH=./backup-scripts
+
+# Backup settings
+BACKUP_CRON_SCHEDULE=0 3 * * *
+BACKUP_RETENTION_DAYS=7
+
+# ==============================================
+# SERVER CONFIGURATION (REQUIRED)
+# ==============================================
+# Timezone
+TZ=UTC