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/network.yaml.example

@@ -0,0 +1,73 @@
+# =============================================================================
+# TFM aInventory - Network Configuration Schema (v1.12.0)
+# =============================================================================
+# Purpose: Network ports, SSL settings, and proxy configuration.
+# =============================================================================
+
+# --- Port Assignments ---
+ports:
+  # Host-side port for HTTP backend
+  # Default: 8916
+  # Environment: NETWORK_PORTS_BACKEND_PORT or BACKEND_PORT
+  backend_port: 8916
+
+  # Host-side port for HTTP frontend
+  # Default: 8917
+  # Environment: NETWORK_PORTS_FRONTEND_PORT or FRONTEND_PORT
+  frontend_port: 8917
+
+  # Host-side port for HTTPS backend (via Caddy)
+  # Default: 8918
+  # Environment: NETWORK_PORTS_BACKEND_SSL_PORT or BACKEND_SSL_PORT
+  backend_ssl_port: 8918
+
+  # Host-side port for HTTPS frontend (via Caddy)
+  # Default: 8919
+  # Environment: NETWORK_PORTS_FRONTEND_SSL_PORT or FRONTEND_SSL_PORT
+  frontend_ssl_port: 8919
+
+# --- SSL & Security ---
+ssl:
+  # Enable SSL/TLS termination via reverse proxy?
+  # Default: true
+  # Environment: NETWORK_SSL_ENABLED
+  ssl_enabled: true
+
+  # Path to SSL certificate (if not using Caddy's auto-HTTPS)
+  # Environment: NETWORK_SSL_CERTIFICATE_PATH
+  certificate_path: ""
+
+  # Path to SSL private key
+  # Environment: NETWORK_SSL_KEY_PATH
+  key_path: ""
+
+# --- Proxy (Caddy) Configuration ---
+proxy:
+  # Caddy log level (debug|info|warn|error)
+  # Default: info
+  # Environment: NETWORK_PROXY_CADDY_LOG_LEVEL
+  caddy_log_level: "info"
+
+  # Maximum timeout for reading requests in seconds
+  # Default: 60
+  # Environment: NETWORK_PROXY_READ_TIMEOUT_S
+  proxy_read_timeout_s: 60
+
+  # Maximum request body size in MB
+  # Default: 10
+  # Environment: NETWORK_PROXY_MAX_REQUEST_SIZE_MB
+  max_request_size_mb: 10
+
+# --- CORS Policies ---
+cors:
+  # Comma-separated list of allowed origins
+  # Environment: NETWORK_CORS_ALLOWED_ORIGINS or EXTRA_ALLOWED_ORIGINS
+  allowed_origins: "*"
+
+  # Allowed HTTP methods
+  # Environment: NETWORK_CORS_ALLOWED_METHODS
+  allowed_methods: "GET,POST,PUT,DELETE,OPTIONS"
+
+  # Allowed HTTP headers
+  # Environment: NETWORK_CORS_ALLOWED_HEADERS
+  allowed_headers: "Authorization,Content-Type,Accept"