Merge pull request #22 from srghma/feat_websocket_proxying

feat: websocket proxying support -> add

snippets/server-proxy.conf

@@ -2,17 +2,26 @@
 # specified using $SITES variable
 # more in README
 
+map $http_upgrade $connection_upgrade {
+  default upgrade;
+  '' close;
+}
+
 server {
   listen 443 ssl http2;
   server_name $SERVER_NAME;
 
   include resty-server-https.conf;
 
   location / {
+    proxy_http_version 1.1;
     proxy_pass http://$SERVER_ENDPOINT;
     proxy_set_header Host $host;
     proxy_set_header X-Real-IP $remote_addr;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_set_header X-Forwarded-Proto $scheme;
+    proxy_set_header Upgrade $http_upgrade;
+    proxy_set_header Connection $connection_upgrade;
+    proxy_cache_bypass $http_upgrade;
   }
 }