Add js web stuff to landing page + documentation

.gitignore

@@ -82,5 +82,22 @@ frontend/src/ui/generated/
 wwwroot/public.bundle.min.js.map
 wwwroot/public.bundle.min.js
 internal/handlers/public_pages.gen.go
+
+# ---------------------------------------------------------------------------
+# kjol-web (go/cmd/kjol-web) build output.
+#
+# The rules above came from the application repos and every one of them contains
+# a slash, which anchors it to the directory holding this .gitignore — the repo
+# root. So `wwwroot/bundle.min.js` matches /wwwroot/..., and NOT the identical
+# artifact under go/cmd/kjol-web/wwwroot/. These are the same rules, re-anchored.
+#
+# Everything here is regenerated by `go run ./build`; none of it is authored.
+go/cmd/kjol-web/wwwroot/bundle.min.*
+go/cmd/kjol-web/wwwroot/public.bundle.min.*
+go/cmd/kjol-web/wwwroot/app.css
+go/cmd/kjol-web/wwwroot/wasm_exec.js
+go/cmd/kjol-web/wwwroot/vendor/
+go/cmd/kjol-web/frontend/src/ui/generated/
+go/cmd/kjol-web/internal/handlers/public_pages.gen.go
 # kjol framework (git submodule; deny-list above would otherwise ignore it)
 !/kjol