[#2497] Media preview proxy: added quality config setting, adjusted width/height defaults.

config/config.exs

@@ -441,8 +441,9 @@ config :pleroma, Pleroma.Web.MediaProxy.Invalidation.Script, script_path: nil
 # Note: media preview proxy depends on media proxy to be enabled
 config :pleroma, :media_preview_proxy,
   enabled: false,
-  thumbnail_max_width: 400,
-  thumbnail_max_height: 200,
+  thumbnail_max_width: 600,
+  thumbnail_max_height: 600,
+  quality: 2,
   proxy_opts: [
     head_request_max_read_duration: 5_000
   ]

config/description.exs

@@ -1925,6 +1925,11 @@ config :pleroma, :config_description, [
         type: :integer,
         description: "Max height of preview thumbnail."
       },
+      %{
+        key: :quality,
+        type: :integer,
+        description: "Quality of the output. Ranges from 1 (max quality) to 31 (lowest quality)."
+      },
       %{
         key: :proxy_opts,
         type: :keyword,