adding the custom redis error page back in

www/wp-content/redis-error.php

@@ -0,0 +1,35 @@
+<h2>An error was encountered</h2>
+
+<p>Looks like we've encountered a minor hiccup.</p>
+
+<p>Refresh your browser and this should resolve. If the problem persists please get in touch with support.</p>
+
+<p>The browser will refresh in <span id="countdown"></span></p>
+
+<script type="text/javascript">
+(function countdown(remaining) {
+    if(remaining <= 0)
+        location.reload(true);
+    document.getElementById('countdown').innerHTML = remaining;
+    setTimeout(function(){ countdown(remaining - 1); }, 1000);
+})(5); // 5 seconds
+</script>
+
+<?php
+	$slack_key = getenv( 'PROUD_REDIS_SLACK_KEY' );
+	$url = $_SERVER['HTTP_HOST'];
+
+	$message_content = 'Redis issue on ' . $url . ' at' . date( 'F d Y G:H:s e' );
+
+	$curl = curl_init( $slack_key );
+
+	$message = array( 'payload' => json_encode( array( 'text' => $message_content ) ) );
+
+	curl_setopt( $curl, CURLOPT_SSL_VERIFYPEER, false );
+	curl_setopt( $curl, CURLOPT_POST, true );
+	curl_setopt( $curl, CURLOPT_POSTFIELDS, $message );
+
+	$result = curl_exec( $curl );
+	curl_close( $curl );
+?>
+