feat: add basic white labelling (#146)

apps/web/src/views/public/board/index.tsx

@@ -2,6 +2,7 @@ import Link from "next/link";
 import { useRouter } from "next/router";
 import { t } from "@lingui/core/macro";
 import { keepPreviousData } from "@tanstack/react-query";
+import { env } from "next-runtime-env";
 import { useEffect, useState } from "react";
 import { HiLink, HiOutlineLockClosed } from "react-icons/hi2";
 
@@ -19,6 +20,10 @@ import Card from "~/views/board/components/Card";
 import Filters from "~/views/board/components/Filters";
 import { CardModal } from "./CardModal";
 
+const IS_CLOUD = env("NEXT_PUBLIC_KAN_ENV") === "cloud";
+const HIDE_POWERED_BY =
+  env("NEXT_PUBLIC_WHITE_LABEL_HIDE_POWERED_BY") === "true";
+
 export default function PublicBoardView() {
   const router = useRouter();
   const { showPopup } = usePopup();
@@ -194,12 +199,26 @@ export default function PublicBoardView() {
             <CopyBoardLink />
           </div>
 
-          <Link
-            className="text-lg font-bold tracking-tight text-neutral-900 dark:text-dark-1000"
-            href="/"
-          >
-            kan.bn
-          </Link>
+          {IS_CLOUD && (
+            <Link
+              className="text-lg font-bold tracking-tight text-neutral-900 dark:text-dark-1000"
+              href="/"
+            >
+              kan.bn
+            </Link>
+          )}
+
+          {!IS_CLOUD && !HIDE_POWERED_BY && (
+            <a
+              href="https://kan.bn"
+              target="_blank"
+              rel="noreferrer noopener"
+              className="absolute right-[1rem] inline-flex items-center gap-[0.175rem] rounded-full border border-light-300 bg-light-50 px-3 py-1 text-[11px] font-medium text-light-950 shadow-sm transition-colors hover:bg-light-100 dark:border-dark-300 dark:bg-dark-50 dark:text-dark-900 dark:hover:bg-dark-100"
+            >
+              <span>{`Powered by`}</span>
+              <span className="font-semibold">kan.bn</span>
+            </a>
+          )}
         </div>
       </div>
       <Popup />