gitbook/next.config.js

const { withSentryConfig } = require('@sentry/nextjs');

module.exports = withSentryConfig(
    {
        env: {
            BUILD_VERSION: (process.env.GITHUB_SHA ?? '').slice(0, 7),
            SENTRY_DSN: process.env.SENTRY_DSN ?? '',
            SENTRY_ENVIRONMENT: process.env.SENTRY_ENVIRONMENT ?? 'development',
            GITBOOK_ASSETS_PREFIX: process.env.GITBOOK_ASSETS_PREFIX,
        },

        webpack(config, { dev, webpack }) {
            config.resolve.fallback = {
                ...config.resolve.fallback,

                // Required for `swagger2openapi` to work:
                fs: false,
                path: false,
                http: false,
            };

            // Tree shake debug code for Sentry
            // https://docs.sentry.io/platforms/javascript/guides/nextjs/configuration/tree-shaking/#tree-shaking-with-nextjs
            if (!dev) {
                config.plugins.push(
                    new webpack.DefinePlugin({
                        __SENTRY_DEBUG__: false,
                        // We always init Sentry with enableTracing: false for now, so this is useless
                        __SENTRY_TRACING__: false,
                        __RRWEB_EXCLUDE_IFRAME__: true,
                        __RRWEB_EXCLUDE_SHADOW_DOM__: true,
                        __SENTRY_EXCLUDE_REPLAY_WORKER__: true,
                    }),
                );
            }

            return config;
        },

        async headers() {
            return [
                // Cache all static assets for 1 year
                {
                    source: '/~gitbook/static/:path*',
                    headers: [
                        {
                            key: 'Cache-Control',
                            value: 'public, max-age=31536000, immutable',
                        },
                    ],
                },
            ];
        },

        assetPrefix: process.env.GITBOOK_ASSETS_PREFIX,
        poweredByHeader: false,

        images: {
            remotePatterns: [
                {
                    protocol: 'https',
                    hostname: '*.gitbook.io',
                },
            ],
        },
    },
    {
        silent: true,
        org: process.env.SENTRY_ORG,
        project: process.env.SENTRY_PROJECT,
    },
    {
        // Upload a larger set of source maps for prettier stack traces (increases build time)
        widenClientFileUpload: true,
        transpileClientSDK: false,
        // Routes browser requests to Sentry through a Next.js rewrite to circumvent ad-blockers (increases server load)
        tunnelRoute: '/~gitbook/monitoring',
        // Don't hide source maps from generated client bundles
        hideSourceMaps: false,
        disableLogger: true,
        automaticVercelMonitors: false,
    },
);