Revert "Rename directories"

This reverts commit 9f3226aec5.

taking-flight-with-tailwind-css/sections/file-size.rst

@@ -0,0 +1,78 @@
+.. page:: titlePage
+
+.. class:: centredtitle
+
+Keeping Things Small: Controlling the File size
+
+.. page:: titlePage
+
+.. class:: centredtitle
+
+Disabling unused variants and core plugins
+
+.. page:: standardPage
+
+Default variants
+================
+
+.. code-block:: javascript
+    :include: code/15-variants-before.txt
+
+Updated variants
+================
+
+.. code-block:: diff 
+    :include: code/16-variants-after.txt
+
+.. page:: titlePage
+
+.. class:: centredtitle
+
+Manually removing unused or unwanted classes
+
+.. page:: standardPage
+
+.. code-block:: javascript
+    :include: code/17-config-before.txt
+
+.. page::
+
+.. code-block:: diff 
+    :include: code/18-config-after.txt
+
+.. raw:: pdf
+
+    TextAnnotation "Needs to be done manually"
+
+.. page:: titlePage
+
+.. class:: centredtitle
+
+Automatically removing unused classes
+
+.. page::
+
+.. class:: centredtitle
+
+Tailwind + PurgeCSS
+
+.. page:: standardPage
+
+PurgeCSS configuration
+======================
+
+.. code-block:: javascript
+    :include: code/19-purge-config.txt
+
+.. page:: titlePage
+
+.. class:: centredtitle
+
+``npx encore dev``
+
+.. page::
+
+.. class:: centredtitle
+
+``NODE_ENV=production
+npx encore prod``