Move site into public/ to avoid uploading node_modules as assets

wrangler deploy runs npm install first, which creates node_modules at
the repo root. With assets directory "." that got picked up as a
static asset, including workerd's 122MB binary, exceeding the 25MiB
Workers asset limit. Serving from ./public keeps node_modules out of
the assets directory entirely.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

wrangler.toml

@@ -7,9 +7,9 @@ name = "portfolio"
 # Set this to the date you first deploy; Wrangler uses it to pin runtime behavior.
 compatibility_date = "2026-09-17"
 
-# Serves every file in this directory as a static asset. Since index.html sits
-# at the repo root, "." works; move it into e.g. "./public" and update this if
-# you'd rather keep the repo root clean.
+# Serves every file in this directory as a static asset. Kept in ./public
+# (rather than the repo root) so that node_modules created by `npm install`
+# during CI deploys is never picked up as a site asset.
 [assets]
-directory = "."
+directory = "./public"
 not_found_handling = "404-page"