add deco render cache control via env vars

Author: guitavano

runtime/routes/render.tsx

@@ -70,6 +70,8 @@ const fromRequest = (req: Request): Options => {
   };
 };
 
+const DECO_RENDER_CACHE_CONTROL = Deno.env.get("DECO_RENDER_CACHE_CONTROL") || "public, max-age=60, must-revalidate, s-maxage=60, stale-while-revalidate=3600, stale-if-error=86400";
+
 export const handler = createHandler(async (
   ctx,
 ) => {
@@ -103,7 +105,7 @@ export const handler = createHandler(async (
     // We can test if caching on the browser helps too.
     response.headers.set(
       "cache-control",
-      "public, max-age=60, must-revalidate, s-maxage=60, stale-while-revalidate=3600, stale-if-error=86400",
+      DECO_RENDER_CACHE_CONTROL,
     );
   } else {
     response.headers.set(