Storybook tweaks 2.0

This should get rid of any warnings in the browser console related to the websocket

Dockerfile

@@ -51,4 +51,3 @@ FROM proxy AS storybook
 COPY /storybook /
 
 ENV NGINX_PROXY_PASS=http://app:6006
-ENV SERVER_CHANNEL_PROXY_PASS=ws://app:6006/storybook-server-channel

context/storybook/etc/nginx/templates/default.conf.template

@@ -6,7 +6,6 @@ server {
 
     location / {
         proxy_pass ${NGINX_PROXY_PASS};
-        proxy_pass_reverse ${NGINX_PROXY_PASS};
     }
 
     location /__webpack-hmr {
@@ -18,6 +17,10 @@ server {
     }
 
     location /storybook-server-channel {
-        proxy_pass ${SERVER_CHANNEL_PROXY_PASS};
+        proxy_pass ${NGINX_PROXY_PASS};
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "Upgrade";
+        proxy_set_header Host $host;
     }
 }