fix nginx conf file (#1229)

nginx/nginx.conf

@@ -27,13 +27,13 @@ http {
   # }
 
   upstream server {
-    server $IMMICH_SERVER_HOST
-    keepalive 2
+    server $IMMICH_SERVER_HOST;
+    keepalive 2;
   }
 
   upstream web {
-    server $IMMICH_WEB_HOST
-    keepalive 2
+    server $IMMICH_WEB_HOST;
+    keepalive 2;
   }
 
   server {