more caching improvements

lambda.js

@@ -0,0 +1,52 @@
+'use strict';
+exports.handler = (event, context, callback) => {
+    // Get contents of response
+    const response = event.Records[0].cf.response;
+
+    response.headers['Strict-Transport-Security'] = [{
+      key: 'Strict-Transport-Security',
+      value: "max-age=31536000; includeSubdomains"
+    }];
+    response.headers['X-Frame-Options'] = [{
+      key: 'X-Frame-Options',
+      value: "SAMEORIGIN"
+    }];
+    response.headers['X-Content-Type-Options'] = [{
+      key: 'X-Content-Type-Options',
+      value: "nosniff"
+    }];
+    response.headers['Referrer-Policy'] = [{
+      key: 'Referrer-Policy',
+      value: "same-origin"
+    }];
+    response.headers['X-XSS-Protection'] = [{
+      key: 'X-XSS-Protection',
+      value: "1; mode=block; report=https://jarvis.report-uri.com/r/d/xss/enforce"
+    }];
+//    response.headers['Accept-Ranges'] = [{
+//      key: 'Accept-Ranges',
+//      value: "bytes"
+//    }];
+    response.headers['Content-Security-Policy'] = [{
+      key: 'Content-Security-Policy',
+      value: "default-src 'self'; script-src 'self' stats.jarv.is 'sha256-TLAu2p9kt4LHt+sWwE0cvqq1Ok5LoGzRPrw7+mzhX00='; style-src 'self' 'unsafe-inline'; img-src 'self' data: https:; font-src 'self'; frame-src 'self'; connect-src 'self' jarvis.report-uri.com stats.jarv.is; upgrade-insecure-requests; report-uri https://jarvis.report-uri.com/r/d/csp/enforce"
+    }];
+    response.headers['X-DNS-Prefetch-Control'] = [{
+      key: 'X-DNS-Prefetch-Control',
+      value: "off"
+    }];
+    response.headers['X-UA-Compatible'] = [{
+      key: 'X-UA-Compatible',
+      value: "IE=edge"
+    }];
+    response.headers['Expect-CT'] = [{
+      key: 'Expect-CT',
+      value: "max-age=0, report-uri=https://jarvis.report-uri.com/r/d/ct/reportOnly"
+    }];
+
+    delete response.headers['Last-Modified'];
+    delete response.headers['Expires'];
+
+    // Return modified response
+    callback(null, response);
+};