docs: add README for using squoosh

src/assets/images/README.md

@@ -0,0 +1,38 @@
+# Optimizing Images with Squoosh
+
+Squoosh is a fantastic [open-source](https://github.com/GoogleChromeLabs/squoosh) image compression tool by Google usable both as a [web app ](https://squoosh.app/) and as a [CLI tool](https://www.npmjs.com/package/@squoosh/cli). Although the CLI is no longer maintained, it still is useful for bulk compressing images (such as every year's new board members).
+
+## Using the Squoosh CLI
+
+> [!IMPORTANT]  
+> The Squoosh CLI does not support Node versions 18 and above. **Node 16 is recommended (`nvm use 16`).**
+
+For our directory structure (as of Aug. 2024):
+
+```
+DUCI-website
+ └─ src
+    └─ assets
+       └─ images
+          ├─ board
+          │  ├─ current
+          │  └─ alumni
+          └─ merch
+             ├─ ...
+```
+
+If you wanted to optimize all images within `current/`, you'd run (at the root):
+
+```
+npx @squoosh/cli --mozjpeg '{quality:75}' \
+-d src/assets/images/output \
+src/assets/images/board/alumni
+```
+
+Breaking it down:
+
+1. `npx @squoosh/cli` — calls the Squoosh CLI
+2. `--mozjpeg` — a flag converting images to `mozjpeg`
+3. `'{quality:75}'` — options
+4. `-d src/assets/images/output` — creates a directory with the outputted images at the specified location
+5. `src/assets/images/board/alumni` — what file(s) to compress