Add pagination support (#52)

* Add pagination support

* Change posts per page value to 10

* Change /blog/1 page to be same as /blog/
Modify canonical url to reflect current page

* Conditionally render pagination component

components/Pagination.js

@@ -0,0 +1,36 @@
+import Link from '@/components/Link'
+
+export default function Pagination({ totalPages, currentPage }) {
+  const prevPage = parseInt(currentPage) - 1 > 0
+  const nextPage = parseInt(currentPage) + 1 <= parseInt(totalPages)
+
+  return (
+    <div className="pt-6 pb-8 space-y-2 md:space-y-5">
+      <nav className="flex justify-between">
+        {!prevPage && (
+          <button rel="previous" className="cursor-auto disabled:opacity-50" disabled={!prevPage}>
+            Previous
+          </button>
+        )}
+        {prevPage && (
+          <Link href={currentPage - 1 === 1 ? `/blog/` : `/blog/page/${currentPage - 1}`}>
+            <button rel="previous">Previous</button>
+          </Link>
+        )}
+        <span>
+          {currentPage} of {totalPages}
+        </span>
+        {!nextPage && (
+          <button rel="next" className="cursor-auto disabled:opacity-50" disabled={!nextPage}>
+            Next
+          </button>
+        )}
+        {nextPage && (
+          <Link href={`/blog/page/${currentPage + 1}`}>
+            <button rel="next">Next</button>
+          </Link>
+        )}
+      </nav>
+    </div>
+  )
+}