Tweaks to the blog (#1544)

## Description

- Fix incorrect URL
- Truncate blog preview
- Add some SEO optimizations

## Type of change

- [x] 🐛 Bugfix
- [x] 🗺️ Documentation

docs/blog/2022-11-16-corso-announcement-free-backup-for-microsoft-365.md

@@ -14,6 +14,8 @@ If you did some work today, there’s a very good chance you opened a Microsoft
 companies worldwide, and nearly 880,000 companies in the U.S. use the software suite. But with that widespread usage
 comes risk, business-critical data is at risk of loss or corruption, if not securely backed up and protected.
 
+<!-- truncate -->
+
 ## The problem with built-in backups
 
 A couple of years back I took the time to get the AWS ‘baby cert,’ their first certification. The focus of the

docs/docusaurus.config.js

@@ -8,7 +8,7 @@ const darkCodeTheme = require('prism-react-renderer/themes/dracula');
 const config = {
   title: 'Corso Documentation',
   tagline: 'Free, Secure, and Open-Source Backup for Microsoft 365',
-  url: 'https://corsobackup.io',
+  url: 'https://docs.corsobackup.io',
   baseUrl: process.env.CORSO_DOCS_BASEURL || '/',
   onBrokenLinks: 'throw',
   onBrokenMarkdownLinks: 'throw',
@@ -50,6 +50,8 @@ const config = {
         },
         blog: {
           showReadingTime: true,
+          blogTitle: 'Corso Blog',
+          blogDescription: 'Blog about Microsoft 365 protection, backup, and security',
         },
         sitemap: {
           ignorePatterns: ['/tags/**'],