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>

Dockerfile

@@ -0,0 +1,57 @@
+# Build stage
+FROM node:20-alpine AS builder
+
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+
+# Install dependencies
+RUN npm ci
+
+# Copy source files
+COPY tsconfig.json ./
+COPY build.js ./
+COPY src ./src
+
+# Build TypeScript
+RUN npm run build
+
+# Production stage
+FROM node:20-alpine
+
+WORKDIR /app
+
+# Install production dependencies only
+COPY package*.json ./
+RUN npm ci --omit=dev && \
+    npm cache clean --force
+
+# Copy built files from builder
+COPY --from=builder /app/dist ./dist
+
+# Create data directory for SQLite
+RUN mkdir -p /app/data && \
+    chown -R node:node /app
+
+# Switch to non-root user
+USER node
+
+# Environment variables with defaults
+ENV PORT=3000
+ENV STORAGE_TYPE=sqlite
+ENV STORAGE_PATH=/app/data/sessions.db
+ENV SESSION_TIMEOUT=300000
+ENV CODE_CHARS=0123456789
+ENV CODE_LENGTH=9
+ENV CORS_ORIGINS=*
+
+# Expose port
+EXPOSE 3000
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD node -e "require('http').get('http://localhost:${PORT}/health', (r) => process.exit(r.statusCode === 200 ? 0 : 1))"
+
+# Start server
+CMD ["node", "dist/index.js"]