Add HTTPS/SSL support

[mvalancy]

Add HTTPS/SSL Support

Summary

Add HTTPS/TLS encryption to GraphDone's HTTP server for secure production deployments and development
environments.

Current State

• HTTP only: Server uses createServer from Node.js http module (packages/server/src/index.ts:200)
• Deployment ready: Docker containers configured with health checks and service orchestration
• Environment variables: Already using .env configuration pattern
• Client support: Web client already detects protocol with window.location.protocol === 'https:'
  (packages/web/src/lib/apollo.ts:14,23)

Implementation Requirements

Server Changes:
// packages/server/src/index.ts
import { createServer } from 'https'; // Instead of 'http'
import fs from 'fs';

// Add SSL certificate loading
const httpsServer = createServer({
key: fs.readFileSync(process.env.SSL_KEY_PATH),
cert: fs.readFileSync(process.env.SSL_CERT_PATH)
}, app);

Environment Variables:

.env additions

SSL_ENABLED=true
SSL_KEY_PATH=/path/to/private-key.pem
SSL_CERT_PATH=/path/to/certificate.pem
HTTPS_PORT=4128

Docker Updates:

• Mount SSL certificates as volumes
• Expose HTTPS port (4128)
• Update health checks to use HTTPS URLs

Benefits

• Production security - Encrypted API communication
• WebSocket security - WSS:// protocol for real-time features
• CORS compliance - Modern browsers require HTTPS for many features
• Deployment ready - Kubernetes/production environments typically require TLS

Acceptance Criteria

• Server starts with HTTPS when SSL_ENABLED=true
• Maintains HTTP fallback for development
• WebSocket upgrades to WSS when using HTTPS
• Docker configuration supports certificate mounting
• Health checks work over HTTPS