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-optional

@@ -0,0 +1,51 @@
+# ==============================================
+# AZEROTHCORE OPTIONAL SERVICES ENVIRONMENT
+# ==============================================
+# Environment variables for modules and monitoring services
+
+# ==============================================
+# DOCKER IMAGES (REQUIRED)
+# ==============================================
+# Optional service images
+AC_ELUNA_IMAGE=acore/eluna-ts:master
+ALPINE_GIT_IMAGE=alpine/git:latest
+
+# ==============================================
+# IMAGE PULL POLICY (REQUIRED)
+# ==============================================
+IMAGE_PULL_POLICY=if_not_present
+
+# ==============================================
+# DEPLOYMENT CONFIGURATION (REQUIRED)
+# ==============================================
+# Storage configuration (must match other layers)
+STORAGE_PATH=/nfs/containers/azerothcore
+
+# Deployment mode
+DEPLOYMENT_MODE=local
+
+# ==============================================
+# CONTAINER NAMES (REQUIRED)
+# ==============================================
+# Optional service container names
+CONTAINER_ELUNA=ac-eluna
+CONTAINER_MODULES=ac-modules
+
+# Reference to core services (for external linking)
+CONTAINER_WORLDSERVER=ac-worldserver
+
+# ==============================================
+# NETWORK SETTINGS (REQUIRED)
+# ==============================================
+# Network must already exist from database layer
+NETWORK_NAME=azerothcore
+
+# ==============================================
+# CUSTOM MODULE SETTINGS
+# ==============================================
+# Module Management (1 = enabled, 0 = disabled)
+MODULE_PLAYERBOTS=1
+MODULE_AOE_LOOT=0
+MODULE_LEARN_SPELLS=0
+MODULE_FIREWORKS=0
+MODULE_INDIVIDUAL_PROGRESSION=0