a pair of small fixes to infra/nginx.conf.j2, to ensure WebSockets functionality; & to role-select.js, to fix the inventory from not updating to that of the new position when a gamer passed the Role cards to the next position when he also occupies that position; separate inventories now ensured

infra/nginx.conf.j2

@@ -17,6 +17,9 @@ server {
 
     location / {
         proxy_pass http://127.0.0.1:8888;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "upgrade";
         proxy_set_header Host $host;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;