add date to results

observe_main.html

@@ -1118,12 +1118,14 @@
     result_submit.addEventListener('click', send_result_to_backend);
 
     function send_result_to_backend(){
+      console.log(camera_chooser.value);
       let to_send = {
         "result" : result,
         "sampleID" : sample_chooser.value,
         "setupID" : camera_chooser.value,
         "prepID" : protocol_chooser.value,
         "dilution" : dilution_chooser.value,
+        "datetime" : new Date,
       }
 
       let transaction =  db.transaction(["main_scan"], "readwrite");