Initial commit: Rondevu signaling server

Open signaling and tracking server for peer discovery in distributed P2P applications.

Features:
- REST API for WebRTC peer discovery and signaling
- Origin-based session isolation
- Multiple storage backends (SQLite, in-memory, Cloudflare KV)
- Docker and Cloudflare Workers deployment support
- Automatic session cleanup and expiration

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/config.ts

@@ -0,0 +1,26 @@
+/**
+ * Application configuration
+ * Reads from environment variables with sensible defaults
+ */
+export interface Config {
+  port: number;
+  storageType: 'sqlite' | 'memory';
+  storagePath: string;
+  sessionTimeout: number;
+  corsOrigins: string[];
+}
+
+/**
+ * Loads configuration from environment variables
+ */
+export function loadConfig(): Config {
+  return {
+    port: parseInt(process.env.PORT || '3000', 10),
+    storageType: (process.env.STORAGE_TYPE || 'sqlite') as 'sqlite' | 'memory',
+    storagePath: process.env.STORAGE_PATH || ':memory:',
+    sessionTimeout: parseInt(process.env.SESSION_TIMEOUT || '300000', 10),
+    corsOrigins: process.env.CORS_ORIGINS
+      ? process.env.CORS_ORIGINS.split(',').map(o => o.trim())
+      : ['*'],
+  };
+}