Initial commit: DashCaddy v1.0

Full codebase including API server (32 modules + routes), dashboard frontend,
DashCA certificate distribution, installer script, and deployment skills.

dashcaddy-api/cache-config.js

@@ -0,0 +1,61 @@
+// Cache Configuration Module
+// Provides LRU cache configurations to prevent memory leaks
+
+const { LRUCache } = require('lru-cache');
+
+/**
+ * Cache configuration presets for different data types
+ * All TTL values are in milliseconds
+ */
+const CACHE_CONFIGS = {
+  // App session cookies (login tokens for SSO)
+  appSessions: {
+    max: 500,                    // Max 500 different services
+    ttl: 60 * 60 * 1000,        // 1 hour TTL
+    updateAgeOnGet: true,        // Refresh TTL on access
+    ttlAutopurge: true           // Auto-cleanup expired entries
+  },
+
+  // IP-based router sessions (Frontier NVG468MQ)
+  ipSessions: {
+    max: 1000,                   // Support up to 1000 IP addresses
+    ttl: 24 * 60 * 60 * 1000,   // 24 hour TTL
+    updateAgeOnGet: true,
+    ttlAutopurge: true
+  },
+
+  // DNS server authentication tokens (Technitium)
+  dnsTokens: {
+    max: 50,                     // Max 50 DNS servers
+    ttl: 6 * 60 * 60 * 1000,    // 6 hour TTL (matches SESSION_TTL.DNS_TOKEN)
+    updateAgeOnGet: false,       // Don't refresh - tokens have fixed expiry
+    ttlAutopurge: true
+  },
+
+  // Tailscale network status
+  tailscaleStatus: {
+    max: 1,                      // Only one status object
+    ttl: 60 * 1000,             // 1 minute TTL
+    updateAgeOnGet: false,
+    ttlAutopurge: true
+  },
+
+  // Tailscale API responses (devices, ACLs)
+  tailscaleAPI: {
+    max: 5,                      // devices + ACL + misc
+    ttl: 5 * 60 * 1000,         // 5 min (matches sync interval)
+    updateAgeOnGet: false,
+    ttlAutopurge: true
+  }
+};
+
+/**
+ * Factory function to create a configured LRU cache
+ * @param {Object} config - Cache configuration from CACHE_CONFIGS
+ * @returns {LRUCache} Configured LRU cache instance
+ */
+function createCache(config) {
+  return new LRUCache(config);
+}
+
+module.exports = { CACHE_CONFIGS, createCache };