init: astro publish site with newsletter, search, and actions workflow

src/consts.ts

@@ -0,0 +1,5 @@
+// Place any global data in this file.
+// You can import this data from anywhere in your site by using the `import` keyword.
+
+export const SITE_TITLE = 'Astro Blog';
+export const SITE_DESCRIPTION = 'Welcome to my website!';