init(frontend): add frontend server

also add static files and auth page

web/server/handlers.go

@@ -0,0 +1,16 @@
+package server
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+func root(c *gin.Context) {
+	authorized := c.GetBool("authorized")
+	if authorized {
+		c.HTML(http.StatusOK, "quotes.html", nil)
+	} else {
+		c.HTML(http.StatusOK, "auth.html", nil)
+	}
+}