fix] revert searxng/searxng#4699 due to breaking issues (#4720)

This reverts commit 2e74d86321.

dockerfiles/uwsgi.ini

@@ -3,6 +3,10 @@
 # default value: [::]:8080 (see Dockerfile)
 http-socket = $(BIND_ADDRESS)
 
+# Who will run the code
+uid = searxng
+gid = searxng
+
 # Number of workers (usually CPU count)
 # default value: %k (= number of CPU core, see Dockerfile)
 workers = $(UWSGI_WORKERS)
@@ -17,6 +21,7 @@ chmod-socket = 666
 # Plugin to use and interpreter config
 single-interpreter = true
 master = true
+plugin = python3
 lazy-apps = true
 enable-threads = true