Add edge redirection for missing resolutions to full res

As a temporary measure while I need to use 720w urls but not all images have a 720w.

edge/.gitignore

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+# package directories
+node_modules
+jspm_packages
+
+# Serverless directories
+.serverless
+.build
+
+secrets.*.yml
+tsoa-build

edge/.nvmrc

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+20

edge/imageOriginResponse.ts

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+import { CloudFrontResponseHandler } from "aws-lambda";
+
+export const handler: CloudFrontResponseHandler = async (event) => {
+  // Extract the request and response from the event object
+  const request = event.Records[0].cf.request;
+  const response = event.Records[0].cf.response;
+
+  // Get the requested URI
+  const requestedUri = request.uri;
+
+  if (response.status === "404") {
+    const match = requestedUri.match(/^\/(\d+)\-(\w+)\/(.*)$/);
+
+    // If they requested a specific width that does not exist, redirect to full width
+    if (match) {
+      const [, _width, format, rootKey] = match;
+      return {
+        status: "302",
+        statusDescription: "Found",
+        headers: {
+          ...response.headers,
+          location: [
+            {
+              key: "Location",
+              value: `/${format}/${rootKey}`,
+            },
+          ],
+        },
+      };
+    }
+  }
+
+  // Return the original response if no redirect is needed
+  return response;
+};