[mod] check secret_key when searx.webapp is imported

Without this commit the module searx checks the secret_key value.

With this commit, make docs, utils/standalone_searx.py,
utils/fetch_firefox_version.py works without SEARX_DEBUG=1

For reference see searx#2386

searx/__init__.py

@@ -60,7 +60,3 @@
     settings['server']['secret_key'] = environ['SEARX_SECRET']
 if 'SEARX_BIND_ADDRESS' in environ:
     settings['server']['bind_address'] = environ['SEARX_BIND_ADDRESS']
-
-if not searx_debug and settings['server']['secret_key'] == 'ultrasecretkey':
-    logger.error('server.secret_key is not changed. Please use something else instead of ultrasecretkey.')
-    exit(1)

searx/webapp.py

@@ -86,6 +86,11 @@
 from werkzeug.serving import WSGIRequestHandler
 WSGIRequestHandler.protocol_version = "HTTP/{}".format(settings['server'].get('http_protocol_version', '1.0'))
 
+# check secret_key
+if not searx_debug and settings['server']['secret_key'] == 'ultrasecretkey':
+    logger.error('server.secret_key is not changed. Please use something else instead of ultrasecretkey.')
+    exit(1)
+
 # about static
 static_path = get_resources_directory(searx_dir, 'static', settings['ui']['static_path'])
 logger.debug('static directory is %s', static_path)

utils/standalone_searx.py

@@ -15,7 +15,7 @@
 
 .. code::  bash
 
-    $ SEARX_DEBUG=1 python3 utils/standalone_searx.py rain
+    $ python3 utils/standalone_searx.py rain
 
 Example to run it from python: