healthcheck endpoint

searx/webapp.py

@@ -618,6 +618,11 @@ def index():
     )
 
 
+@app.route('/healthz', methods=['GET'])
+def health():
+    return Response('OK', mimetype='text/plain')
+
+
 @app.route('/search', methods=['GET', 'POST'])
 def search():
     """Search query in q and return results.

tests/unit/test_webapp.py

@@ -191,6 +191,11 @@ class ViewsTestCase(SearxTestCase):
         self.assertEqual(result.status_code, 200)
         self.assertIn(b'<h1>About <a href="/">searxng</a></h1>', result.data)
 
+    def test_health(self):
+        result = self.app.get('/healthz')
+        self.assertEqual(result.status_code, 200)
+        self.assertIn(b'OK', result.data)
+
     def test_preferences(self):
         result = self.app.get('/preferences')
         self.assertEqual(result.status_code, 200)