Moved code into src folder. Added build for component library.

src/store/version.js

@@ -0,0 +1,55 @@
+import { create } from 'zustand';
+import produce from 'immer';
+import semver from 'semver';
+import { CURRENT_VERSION, VERSION_CHECK, UPDATES_URL } from 'lib/constants';
+import { getItem } from 'next-basics';
+
+const initialState = {
+  current: CURRENT_VERSION,
+  latest: null,
+  hasUpdate: false,
+  checked: false,
+  releaseUrl: null,
+};
+
+const store = create(() => ({ ...initialState }));
+
+export async function checkVersion() {
+  const { current } = store.getState();
+
+  const data = await fetch(`${UPDATES_URL}?v=${current}`, {
+    method: 'GET',
+    headers: {
+      Accept: 'application/json',
+    },
+  }).then(res => {
+    if (res.ok) {
+      return res.json();
+    }
+
+    return null;
+  });
+
+  if (!data) {
+    return;
+  }
+
+  store.setState(
+    produce(state => {
+      const { latest, url } = data;
+      const lastCheck = getItem(VERSION_CHECK);
+
+      const hasUpdate = !!(latest && lastCheck?.version !== latest && semver.gt(latest, current));
+
+      state.current = current;
+      state.latest = latest;
+      state.hasUpdate = hasUpdate;
+      state.checked = true;
+      state.releaseUrl = url;
+
+      return state;
+    }),
+  );
+}
+
+export default store;