Add libtidy-dev

Signed-off-by: solidnerd <[email protected]>

Author: solidnerd

Dockerfile

@@ -3,7 +3,7 @@ FROM php:7.0-apache
 ENV BOOKSTACK=BookStack \
     BOOKSTACK_VERSION=0.13.0
 
-RUN apt-get update && apt-get install -y git zlib1g-dev libfreetype6-dev libjpeg62-turbo-dev libmcrypt-dev libpng12-dev wget libldap2-dev \
+RUN apt-get update && apt-get install -y git zlib1g-dev libfreetype6-dev libjpeg62-turbo-dev libmcrypt-dev libpng12-dev wget libldap2-dev libtidy-dev \
    && docker-php-ext-install pdo pdo_mysql mbstring zip tidy \
    && docker-php-ext-configure ldap --with-libdir=lib/x86_64-linux-gnu/ \
    && docker-php-ext-install ldap \