install php ldap module

Dockerfile

@@ -8,8 +8,11 @@ RUN apt-get update && apt-get install -y \
 	bash \
 	perl \
 	libcgi-pm-perl \
+	libldap2-dev \
 	&& rm -rf /var/lib/apt/lists/*
 
+RUN docker-php-ext-install ldap
+
 # Enable CGI module
 RUN a2enmod cgi headers rewrite include