Use ISO string and add comment

Author: jboolean

backend/src/cron/syncMapSelfHosted.ts

@@ -36,7 +36,7 @@ export default async function syncMap(): Promise<void> {
   console.log('Uploading PMTiles to S3...');
   const pmtilesStream = createReadStream(result.outputPath);
 
-  const key = `photos-1940s_${Date.now()}.pmtiles`;
+  const key = `photos-1940s_${new Date().toISOString()}.pmtiles`;
 
   await s3.send(
     new PutObjectCommand({
@@ -48,6 +48,10 @@ export default async function syncMap(): Promise<void> {
     })
   );
 
+// Setup, this specifies a redirect from photos-1940s_latest.pmtiles to the actual latest file
+// Website mode isn't appropriate for this bucket due to permissioning, which is required to respect this header, 
+// so there's a Lambda@Edge that actually does the redirect based on the same website redirect header
+
    await s3.send(
     new PutObjectCommand({
       Bucket: 'fourties-maps',