improve: cache tool icons by setting max-age HTTP header and enable gzip compression SVG icons from backend (#2971)

api/extensions/ext_compress.py

@@ -5,6 +5,12 @@ def init_app(app: Flask):
     if app.config.get('API_COMPRESSION_ENABLED', False):
         from flask_compress import Compress
 
+        app.config['COMPRESS_MIMETYPES'] = [
+            'application/json',
+            'image/svg+xml',
+            'text/html',
+        ]
+
         compress = Compress()
         compress.init_app(app)