add take picture

src/app/pages/publications/new-publication/convertBlobToBase64.worker.js

@@ -0,0 +1,13 @@
+convertBlobToBase64 = (blob) => new Promise((resolve, reject) => {
+  const reader = new FileReader;
+  reader.onerror = reject;
+  reader.onload = () => {
+    resolve(reader.result);
+  };
+  reader.readAsDataURL(blob);
+});
+
+onmessage = async function(oEvent) {
+  const result = await convertBlobToBase64(oEvent.data);
+  postMessage(result);
+};