Add 'wss:' to connect-src directive in CSP

This will fix Safari console errors for WebSocket connections.

This fix is dependent on
https://gerrit.openbmc-project.xyz/c/openbmc/bmcweb/+/24610

Signed-off-by: Yoshie Muranaka <yoshiemuranaka@gmail.com>
Change-Id: I54987124037c206773bbc4ee690f854bfae8fa19
diff --git a/webpack.config.js b/webpack.config.js
index 28576d5..71b029e 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -136,7 +136,7 @@
       'object-src': '\'none\'',
       'script-src': ['\'self\''],
       'style-src': ['\'self\''],
-      'connect-src': ['\'self\''],
+      'connect-src': ['\'self\'', 'wss:'],
       // KVM requires image buffers from data: payloads, so allow that in
       // img-src
       // https://stackoverflow.com/questions/18447970/content-security-policy-data-not-working-for-base64-images-in-chrome-28