config index image

config/packages/liip_imagine/base.yaml

 # See dos how to configure the bundle: https://symfony.com/doc/current/bundles/LiipImagineBundle/basic-usage.html
 liip_imagine:
-    # valid drivers options include "gd" or "gmagick" or "imagick"
-    driver: "gd"
-    filter_sets:
-        cache: ~
+  # valid drivers options include "gd" or "gmagick" or "imagick"
+  driver: "gd"
+  filter_sets:
+    cache: ~
+    index:
+      quality: 80
+      filters:
         thumbnail:
-            quality: 90
-            filters:
-                thumbnail:
-                    size: [60]
-                    mode: outbound
-        page:
-            quality: 90
-            filters:
-                thumbnail:
-                    size: [ 240 ]
-                    mode: outbound
-        mosaic_big:
-            quality: 90
-            filters:
-                thumbnail:
-                    size: [ 600, 400 ]
-                    mode: outbound
-        big:
-            quality: 90
-            filters:
-                thumbnail:
-                    size: [ 1600 ]
-                    mode: outbound
+          size: [ 60 ]
+          mode: outbound
+    thumbnail:
+      quality: 90
+      filters:
+        thumbnail:
+          size: [ 60 ]
+          mode: outbound
+    page:
+      quality: 90
+      filters:
+        thumbnail:
+          size: [ 240 ]
+          mode: outbound
+    mosaic_big:
+      quality: 90
+      filters:
+        thumbnail:
+          size: [ 600, 400 ]
+          mode: outbound
+    big:
+      quality: 90
+      filters:
+        thumbnail:
+          size: [ 1600 ]
+          mode: outbound