updated docs

build/assets.sh

 #!/bin/sh
 
+# Clean and prepare build
+# see https://github.com/yiisoft/yii2/issues/7414, https://github.com/yiisoft/yii2/issues/7473
 rm -rf web/assets-prod
 mkdir -p web/assets-prod/js
 mkdir -p web/assets-prod/css
-
 touch web/assets-prod/js/backend-temp.js
 touch web/assets-prod/css/all-temp.css
 
+# Compress asset bundles in Docker container
 docker-compose run web ./yii asset config/assets.php config/assets-prod.php
\ No newline at end of file

docs/43-asset-compression.md

-wip
+Asset compression
+-----------------
 
-    mkdir -p web/assets-prod/js
-    mkdir -p web/assets-prod/css
-    touch web/assets-prod/js/backend-temp.js
+Phundament bundles the assets in the `:development` Docker container, which comes pre-installed with all required
+tools, to make use of Yii 2.0 Framework asset compresssion.
+
+    sh build/assets.sh
     
-    docker-compose run web ./yii asset config/assets.php config/assets-prod.php
\ No newline at end of file
+> Note! Make sure not to use a backlash `\` at the beginning of your asset-bundle name, since it may conflict with
+> the `className()` which returns values without a starting backslash
\ No newline at end of file