feat: configure max_age for OGImageController in development and production

- Added a max_age configuration for AlgoraWeb.OGImageController in both dev.exs and prod.exs.
- Updated the OGImageController to retrieve max_age from the configuration instead of using a hardcoded value.

Author: zcesur

config/dev.exs

@@ -142,3 +142,5 @@ config :algora,
   plausible_url: System.get_env("PLAUSIBLE_URL"),
   assets_url: System.get_env("ASSETS_URL"),
   ingest_url: System.get_env("INGEST_URL")
+
+config :algora, AlgoraWeb.OGImageController, max_age: 0

config/prod.exs

@@ -32,5 +32,7 @@ config :algora,
   assets_url: System.get_env("ASSETS_URL"),
   ingest_url: System.get_env("INGEST_URL")
 
+config :algora, AlgoraWeb.OGImageController, max_age: 600
+
 # Runtime production configuration, including reading
 # of environment variables, is done on config/runtime.exs.

lib/algora_web/controllers/og_image_controller.ex

@@ -7,7 +7,7 @@ defmodule AlgoraWeb.OGImageController do
 
   @opts [type: "png", width: 1200, height: 630, scale_factor: 1]
 
-  @max_age 600
+  defp max_age, do: Algora.config([AlgoraWeb.OGImageController, :max_age])
 
   def generate(conn, %{"path" => path}) do
     object_path = Path.join(["og"] ++ path ++ ["og.png"])