next.config.js

const { get } = require('@vercel/edge-config')
const { withContentlayer } = require('next-contentlayer')

/** @type {import('next').NextConfig} */
const nextConfig = {
	experimental: {
		serverActions: true,
	},
	images: {
		formats: ['image/avif', 'image/webp'],
		// Twitter Profile Picture
		remotePatterns: [
			{
				protocol: 'https',
				hostname: 'pbs.twimg.com',
				pathname: '/**',
			},
		],
	},
	redirects() {
		try {
			return get('redirects')
		} catch {
			return []
		}
	},
	headers() {
		return [
			{
				source: '/(.*)',
				headers: securityHeaders,
			},
		]
	},
}

// https://nextjs.org/docs/advanced-features/security-headers
const ContentSecurityPolicy = `
    default-src 'self' vercel.live;
    script-src 'self' 'unsafe-eval' 'unsafe-inline' cdn.vercel-insights.com vercel.live;
    style-src 'self' 'unsafe-inline';
    img-src * blob: data:;
    media-src 'none';
    connect-src *;
    font-src 'self' data:;
`

const securityHeaders = [
	// https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP
	{
		key: 'Content-Security-Policy',
		value: ContentSecurityPolicy.replace(/\n/g, ''),
	},
	// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Referrer-Policy
	{
		key: 'Referrer-Policy',
		value: 'origin-when-cross-origin',
	},
	// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Frame-Options
	{
		key: 'X-Frame-Options',
		value: 'DENY',
	},
	// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options
	{
		key: 'X-Content-Type-Options',
		value: 'nosniff',
	},
	// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-DNS-Prefetch-Control
	{
		key: 'X-DNS-Prefetch-Control',
		value: 'on',
	},
	// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security
	{
		key: 'Strict-Transport-Security',
		value: 'max-age=31536000; includeSubDomains; preload',
	},
	// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Feature-Policy
	{
		key: 'Permissions-Policy',
		value: 'camera=(), microphone=(), geolocation=()',
	},
]

module.exports = withContentlayer(nextConfig)