Demo for query storing

Change-Id: I947bcac841992c3f6cfd01ab337c265b0d01cb70
diff --git a/node_modules/is-jpg/index.js b/node_modules/is-jpg/index.js
new file mode 100644
index 0000000..529e024
--- /dev/null
+++ b/node_modules/is-jpg/index.js
@@ -0,0 +1,10 @@
+'use strict';
+module.exports = buffer => {
+	if (!buffer || buffer.length < 3) {
+		return false;
+	}
+
+	return buffer[0] === 255 &&
+		buffer[1] === 216 &&
+		buffer[2] === 255;
+};