Renamed source directory, changed dockerfile for running docker image according to the official documentation

.gitignore

@@ -1,36 +1,36 @@
-!html/
+!wordpress/
 
-html/*
-!html/wp-content/
-!html/wp-config.php
-!html/wp-config-local-sample.php
-!html/sitemap.xml
+wordpress/*
+!wordpress/wp-content/
+!wordpress/wp-config.php
+!wordpress/wp-config-local-sample.php
+!wordpress/sitemap.xml
 
-html/wp-content/*
-!html/wp-content/mu-plugins/
-!html/wp-content/plugins/
-!html/wp-content/themes/
-!html/wp-content/index.php
-!html/wp-content/sunrise.php
-!html/wp-content/uploads/
-!html/wp-content/uploads/.gitkeep
+wordpress/wp-content/*
+!wordpress/wp-content/mu-plugins/
+!wordpress/wp-content/plugins/
+!wordpress/wp-content/themes/
+!wordpress/wp-content/index.php
+!wordpress/wp-content/sunrise.php
+!wordpress/wp-content/uploads/
+!wordpress/wp-content/uploads/.gitkeep
 
-html/wp-content/mu-plugins/*
-!html/wp-content/mu-plugins/domain_mapping.php
+wordpress/wp-content/mu-plugins/*
+!wordpress/wp-content/mu-plugins/domain_mapping.php
 
-html/wp-content/plugins/*
-!html/wp-content/plugins/index.php
-!html/wp-content/plugins/faq
-!html/wp-content/plugins/disable-image-threshold
+wordpress/wp-content/plugins/*
+!wordpress/wp-content/plugins/index.php
+!wordpress/wp-content/plugins/faq
+!wordpress/wp-content/plugins/disable-image-threshold
 
-html/wp-content/themes/*
-!html/wp-content/themes/lawcarta
-!html/wp-content/themes/livecarta
-!html/wp-content/themes/redesign
-!html/wp-content/themes/index.php
+wordpress/wp-content/themes/*
+!wordpress/wp-content/themes/lawcarta
+!wordpress/wp-content/themes/livecarta
+!wordpress/wp-content/themes/redesign
+!wordpress/wp-content/themes/index.php
 
-!html/wp-content/plugins/wp-rest-api-event
-!html/wp-content/plugins/subscribe-to-lc
+!wordpress/wp-content/plugins/wp-rest-api-event
+!wordpress/wp-content/plugins/subscribe-to-lc
 
 vendor/