Use `guess-mime-type` to get the right file type

should help with some header issues we’re seeing. Also remove `x-frame-options` meta tag, since it’s not acknolwedged by some browsers (like Chrome).

Makefile

@@ -31,7 +31,7 @@ webpack:
 	$(WEBPACK) --bail
 
 sync-s3:
-	$(S3CMD) sync -P --delete-removed --exclude '.DS_Store' --exclude '*.svg' ./build/ s3://$(S3_BUCKET_NAME)/
+	$(S3CMD) sync -P --delete-removed --exclude '.DS_Store' --exclude '*.svg' --guess-mime-type ./build/ s3://$(S3_BUCKET_NAME)/
 	$(S3CMD) sync -P --delete-removed --exclude '*' --include '*.svg' --mime-type 'image/svg+xml'  ./build/ s3://$(S3_BUCKET_NAME)/
 
 sync-fastly:

src/template.html

@@ -6,7 +6,6 @@
         <meta charset="UTF-8" />
 
         <meta http-equiv="x-ua-compatible" content="ie=edge">
-        <meta http-equiv="x-frame-options" content="deny">
         <meta name="viewport" content="width={{viewportWidth}}, initial-scale=1">
 
         <title>Scratch - {{title}}</title>