Add CSP comment to the inline script

Author: Turbo87

app/index.html

@@ -28,6 +28,7 @@
 
     {{content-for 'body'}}
 
+    <!-- if you change the following inline script make sure to change the CSP settings of nginx! -->
     <script>window.onerror=function(){document.body.innerHTML='<p style="width: 70%;background: var(--main-bg);padding: 10px;">Sorry, it looks like we were not able to load the page. Please make sure your network connection works and you are using an up-to-date browser. If the issue persists, please visit our <a href="https://github.com/rust-lang/crates.io/issues/new/choose">issue tracker</a> to report the problem.</p>'}</script>
     <script src="{{rootURL}}assets/vendor.js"></script>
     <script src="{{rootURL}}assets/cargo.js"></script>