Update the expert app to include a logo.

app/cara.ipynb

@@ -1,14 +1,11 @@
 {
- # Add CARA logo somewhere here
  "cells": [
   {
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<p style=\"color: red; font-weight: bold; font-size: xx-large; text-align: center;\" align=\"center\">\n",
-    "    CARA - COVID Airborne Risk Assessment Expert App\n",
-    "</p>\n",
-    "\n",
+    "<div style=\"text-align: center;\" align=\"center\">\n",
+    "<img src=\"../../files/cara/apps/static/images/cara_logo_text_cern_tight_margins.png\" align=\"center\" style=\"text-align: center;\" /></div>\n",
     "<p style=\"color: blue; font-weight: bold; font-size: x-large; text-align: center;\" align=\"center\">\n",
     "Airborne Transmission of SARS-CoV-2\n",
     "</p>"
@@ -53,4 +50,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 4
-}
+}