add proxy to reach mercure server

etc/nginx/sites-available/ogcore.conf

@@ -31,7 +31,21 @@ server {
     location ~ \.php$ {
         return 404;
     }
+    location /mercure/ {
+        proxy_pass http://ogcore-mercure:3000/;
+        proxy_read_timeout 24h;
+        proxy_http_version 1.1;
+        proxy_set_header Connection "";
+
+        # Enable fast reply in SSE
+        proxy_buffering off;
+
+        ## Be sure to set USE_FORWARDED_HEADERS=1 to allow the hub to use those headers ##
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Host $host;
+        proxy_set_header X-Forwarded-Proto $scheme;
+    }
 
     error_log /var/log/nginx/ogcore-error.log;
     access_log /var/log/nginx/ogcore-access.log;
-}
+}