added basic temp file

migration.js

@@ -0,0 +1,25 @@
+const isBeingMigrated = true;
+
+if (isBeingMigrated) {
+	var html = `
+	<div style="
+    position: absolute;
+    z-index: 999;
+    width: 100vw;
+    height: 3em;
+    background-color: lightcoral;
+    top: 0;
+    left: 0;
+    outline: solid 3px red;
+"><p style="
+    font-family: sans-serif;
+    line-height: 3em;
+    text-align: center;
+    color: red;
+    cursor: pointer;
+    position: relative;
+    margin: 0;
+">The bdupont.tech infrastructure is currently being migrated to new servers. Please check <a href="https://status-mig.bdupont.tech/" style="color: red; text-decoration: underline;">https://status-mig.bdupont.tech</a> if you have any issues.</p></div>
+	`
+	document.documentElement.insertAdjacentHTML('beforeend', html);
+}