changed structure for docker usage

app/static/filedrop.js

@@ -0,0 +1,10 @@
+var fileinput;
+function dropHandler(eve) {
+  eve.preventDefault();
+  fileinput.files = eve.dataTransfer.files;
+}
+function init() {
+  fileinput = document.getElementById("filepicker");
+  document.getElementById("filepicker").addEventListener("drop", dropHandler);
+}
+window.addEventListener("load", init);