[mod] include SEARXNG_METHOD environment variable

searx/settings.yml

@@ -101,7 +101,8 @@ server:
   # 1.0 and 1.1 are supported
   http_protocol_version: "1.0"
   # POST queries are more secure as they don't show up in history but may cause
-  # problems when using Firefox containers
+  # problems when using Firefox containers.
+  # Is overwritten by ${SEARXNG_METHOD}
   method: "POST"
   default_http_headers:
     X-Content-Type-Options: nosniff

searx/settings_defaults.py

@@ -182,7 +182,7 @@ SCHEMA = {
         'base_url': SettingsValue((False, str), False, 'SEARXNG_BASE_URL'),
         'image_proxy': SettingsValue(bool, False, 'SEARXNG_IMAGE_PROXY'),
         'http_protocol_version': SettingsValue(('1.0', '1.1'), '1.0'),
-        'method': SettingsValue(('POST', 'GET'), 'POST'),
+        'method': SettingsValue(('POST', 'GET'), 'POST', 'SEARXNG_METHOD'),
         'default_http_headers': SettingsValue(dict, {}),
     },
     'redis': {