Add WP-CLI to Dockerfile, remove exposed MariaDB port

Dockerfile

@@ -11,13 +11,17 @@ ENV PHP_MEMORY_LIMIT=512M
 ENV PHP_UPLOAD_MAX_FILE_SIZE=64M
 ENV PHP_POST_MAX_SIZE=64M
 
-# Install dependencies
+# Install dependencies + WP-CLI
 USER root
 RUN apt-get update && apt-get install -y --no-install-recommends \
     git \
     unzip \
     curl \
-    && rm -rf /var/lib/apt/lists/*
+    less \
+    mariadb-client \
+    && rm -rf /var/lib/apt/lists/* \
+    && curl -o /usr/local/bin/wp https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar \
+    && chmod +x /usr/local/bin/wp
 
 # Copy application
 USER www-data