Cache book covers for longer

src/blog/2022/11ty-airtable.md

@@ -39,7 +39,7 @@ The three packages we're using here are:
 - **Airtable JS Library** - to do the heavy lifting of talking to Airtable and handling the response
 - **dotenv** - so we don't have to hard code any API keys into our code.
 
-```
+```bash
 npm install @11ty/eleventy-cache-assets airtable dotenv
 ```
 

utils/shortcodes.js

@@ -2,15 +2,18 @@ const eleventyImage = require("@11ty/eleventy-img");
 
 module.exports = {
   imgBookCover: async function (filepath, alt, widths, classes, sizes) {
-    if (!filepath) {
-      return;
-    }
+    if (!filepath) { return; }
 
     let options = {
       formats: ["webp", "jpg"],
       widths: widths || [null],
       urlPath: "/_assets/img/bookCovers/",
       outputDir: "./dist/_assets/img/bookCovers/",
+      cacheOptions: {
+        duration: "2y",
+        directory: ".cache",
+        removeUrlQueryParams: false,
+      },
     };
 
     let stats = await eleventyImage(filepath, options);