Protects the install directory from public installation.

docker/Dockerfile

@@ -13,7 +13,7 @@ RUN rm -rf /usr/share/nginx/html; apk update; apk add git; apk add php5-mysql
 RUN git clone https://github.com/fspc/biketree.git /usr/share/nginx/html
 COPY  settings.php /usr/share/nginx/html
 COPY  default.conf /etc/nginx/conf.d
-RUN chown -R nginx:nginx /usr/share/nginx/html; mkdir /var/www; ln -sf /usr/share/nginx/html/ /var/www/html;  chmod 0004 /usr/share/nginx/html/settings.php
+RUN chown -R nginx:nginx /usr/share/nginx/html; mkdir /var/www; ln -sf /usr/share/nginx/html/ /var/www/html;  chmod 0004 /usr/share/nginx/html/settings.php; chomod 0004 /usr/share/nginx/install;
 
 VOLUME /usr/share/nginx/html