feat: add hash tag

src/components/Footer.tsx

@@ -9,7 +9,7 @@ const Footer: React.FC = () => {
       <section className="flex flex-col">
         <section className="mt-1 flex items-center justify-between gap-2 text-[13px] font-light tracking-tight text-neutral-600/50 dark:text-neutral-300/50">
           <p>
-            ©2020-{new Date().getFullYear()}{" "}
+            &copy;2020-{new Date().getFullYear()}{" "}
             <a href={"https://github.com/naiba/nezha"} target="_blank">
               Nezha
             </a>
@@ -22,6 +22,9 @@ const Footer: React.FC = () => {
             >
               nezha-dash
             </a>
+            {import.meta.env.VITE_GIT_HASH && (
+              <span className="ml-1">({import.meta.env.VITE_GIT_HASH})</span>
+            )}
           </p>
         </section>
       </section>