The README described the deployed AWS resources and how to deploy, but
never documented that this is a CDK (infrastructure-as-code) app or what
cdk.json is. Add an Infrastructure (CDK) section covering the app entry
point, the file-share stack, the cdk.json manifest and context cache, and
the synth/diff/deploy commands, so the IaC layer is discoverable.
CDK stack deploying a t4g.small EC2 instance with Samba and FileBrowser
for personal file storage over the site-to-site VPN. Includes 500 GiB
gp3 data volume with daily DLM snapshots.
