Add hook for setting global variables

hooks/globals.py

@@ -0,0 +1,6 @@
+def on_env(env, config, files):
+    env.globals["globals"] = {
+        "foo": "bar"
+    }
+
+    return env

mkdocs.yml

@@ -15,6 +15,7 @@ hooks:
   - hooks/page-render.py
   - hooks/static.py
   - hooks/redirects.py
+  - hooks/globals.py
 
 markdown_extensions:
   - attr_list

theme/main.html

@@ -14,3 +14,5 @@ Children: {{ page|children }}
 Found page: {{ tag_1_page }}
 
 Image resized: {{ "./assets/test.jpg"|resize_image(1500) }}
+
+Globals: {{ globals.foo }}