clean up remaining NEXT_PUBLIC_ environment variables

components/Footer/Footer.tsx

@@ -1,8 +1,8 @@
+import { env } from "../../lib/env";
 import clsx from "clsx";
 import { HeartIcon } from "lucide-react";
 import Link from "../Link";
 import * as config from "../../lib/config";
-import { RELEASE_TIMESTAMP } from "../../lib/config/constants";
 import type { ComponentPropsWithoutRef } from "react";
 
 import styles from "./Footer.module.css";
@@ -22,7 +22,7 @@ const Footer = ({ className, ...rest }: FooterProps) => {
           <Link href="/previously" title="Previously on..." plain className={styles.link}>
             {config.copyrightYearStart}
           </Link>{" "}
-          – {new Date(RELEASE_TIMESTAMP).getUTCFullYear()}.
+          – {new Date().getUTCFullYear()}.
         </div>
 
         <div>
@@ -53,7 +53,7 @@ const Footer = ({ className, ...rest }: FooterProps) => {
           </Link>
           .{" "}
           <Link
-            href={`https://github.com/${config.githubRepo}`}
+            href={`https://github.com/${env.NEXT_PUBLIC_GITHUB_REPO}`}
             title="View Source on GitHub"
             plain
             className={clsx(styles.link, styles.underline)}