Adds endpoint for fetching SSL info

server/lambda/ssl-check.js

@@ -0,0 +1,30 @@
+const https = require('https');
+
+exports.handler = async function (event, context) {
+  const { url } = event.queryStringParameters;
+
+  if (!url) {
+    return {
+      statusCode: 400,
+      body: 'url query parameter is required',
+    };
+  }
+
+  return new Promise((resolve, reject) => {
+    const req = https.request(url, res => {
+      resolve({
+        statusCode: 200,
+        body: JSON.stringify(res.socket.getPeerCertificate()),
+      });
+    });
+
+    req.on('error', (error) => {
+      resolve({
+        statusCode: 500,
+        body: `Error fetching site certificate: ${error.message}`,
+      });
+    });
+
+    req.end();
+  });
+};