docs: update intro text, add "Can I help?" section

source/_includes/link-button.html.twig

@@ -1,5 +1,9 @@
 <a
-    class="inline-flex items-center px-6 py-3 text-base font-medium rounded-md bg-blue-primary text-white no-underline hover:bg-white hover:text-blue-primary focus:bg-white focus:text-blue-primary transition-color ease-in-out duration-200"
+    class="
+        inline-flex items-center px-6 py-3 font-medium rounded-md bg-blue-primary text-white no-underline hover:bg-white hover:text-blue-primary focus:bg-white focus:text-blue-primary transition-color ease-in-out duration-200
+        {{ size == 'normal' ? 'text-base' }}
+        {{ size == 'large' ? 'text-lg' }}
+    "
     href="{{ href }}"
 >
     {% block text '' %}

source/_pages/things-about-php.md

@@ -2,7 +2,11 @@
 title: Things you should know about PHP
 ---
 
-Thanks for attending my talk on [Things you should know about PHP](/talks/things-you-should-know-about-php).
+Thanks for attending my [Things you should know about PHP](/talks/things-you-should-know-about-php) talk.
+
+I hope that you learned some things about PHP, its ecosystem, and its communities, and if you haven't tried using PHP yet, I'd encourage you to do so.
+
+Here are links to the resources that I mention in the talk, plus a couple of extras.
 
 ## Resources
 
@@ -41,3 +45,18 @@ Thanks for attending my talk on [Things you should know about PHP](/talks/things
 - [The Laravel Podcast](https://laravelpodcast.com)
 - [The PHP Roundtable](https://phproundtable.com)
 - [Voices of the elePHPant](https://voicesoftheelephpant.com)
+
+{% include "horizontal-rule" %}
+
+## Can I help?
+
+Do you want to introduce PHP to your company or team, or add one of these tools to your existing PHP application?
+
+I offer consulting calls and services to reduce your onboarding time and get you up and running quicker and easier.
+
+<div class="mt-6">
+    {% set href = "mailto:" ~ site.email ~ "?subject=Book in my call" %}
+    {% embed "link-button" with { href: href, size: "normal" } only %}
+        {% block text "Book in your call →" %}
+    {% endembed %}
+</div>