feat(07-01): create config/ folder and YAML example files

- Added backend.yaml.example with AI, DB, auth, and logging schema
- Added frontend.yaml.example with API and feature flag schema
- Added network.yaml.example with ports and SSL schema
- Added docker.yaml.example with resource and volume schema
- Added secrets.yaml.example as a template for sensitive data
- All files include comprehensive comments documenting every variable

config/docker.yaml.example

@@ -0,0 +1,61 @@
+# =============================================================================
+# TFM aInventory - Docker Configuration Schema (v1.12.0)
+# =============================================================================
+# Purpose: Resource limits, image tags, and volume management for Docker.
+# =============================================================================
+
+# --- Image Management ---
+images:
+  # Backend container image name and tag
+  # Default: backend:latest
+  backend_image: "backend:latest"
+
+  # Frontend container image name and tag
+  # Default: frontend:latest
+  frontend_image: "frontend:latest"
+
+  # Proxy container image name and tag
+  # Default: caddy:latest
+  proxy_image: "caddy:latest"
+
+# --- Resource Constraints ---
+resources:
+  # CPU limit for the backend container
+  # Default: 1.0 (1 core)
+  backend_cpu_limit: "1.0"
+
+  # Memory limit for the backend container
+  # Default: 1G
+  backend_memory_limit: "1G"
+
+  # CPU limit for the frontend container
+  # Default: 0.5 (0.5 core)
+  frontend_cpu_limit: "0.5"
+
+  # Memory limit for the frontend container
+  # Default: 512M
+  frontend_memory_limit: "512M"
+
+# --- Volume Management ---
+volumes:
+  # Driver to use for data volume
+  # Default: local
+  data_volume_driver: "local"
+
+  # Driver to use for logs volume
+  # Default: local
+  logs_volume_driver: "local"
+
+  # Use named volumes instead of bind mounts for persistence?
+  # Default: true
+  use_named_volumes: true
+
+# --- Networking ---
+network:
+  # Internal Docker network name
+  # Default: inventory-net
+  network_name: "inventory-net"
+
+  # Internal Docker network driver
+  # Default: bridge
+  network_driver: "bridge"