Add post about managing images using git submodules

[netlify[bot]]

✅ Deploy Preview for cynthiahqy ready!

Name	Link
🔨 Latest commit	95575c5a88c43e0ad544413246b3e193e192fc41
🔍 Latest deploy log	https://app.netlify.com/sites/cynthiahqy/deploys/66742ebb3475380008d2ab17
😎 Deploy Preview	https://deploy-preview-27--cynthiahqy.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.