feat(webui): bootstrap session handling and login process

pkg/webui/index.go

@@ -0,0 +1,16 @@
+package webui
+
+import (
+	"html/template"
+	"net/http"
+)
+
+var indexTemplates = template.Must(template.ParseFS(htmlFS, "html/base.html", "html/index.html"))
+
+func handleIndexGET() http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Cache-Control", "no-store, no-cache")
+
+		render(w, indexTemplates, http.StatusOK, nil)
+	})
+}