add wait-for-it

Dockerfile

@@ -59,6 +59,9 @@ RUN ln -sf /configuration/supervisord.conf /etc/supervisor/supervisord.conf && \
     ln -sf /configuration/php-fpm-pool.conf /etc/php/7.0/fpm/pool.d/www.conf && \
     ln -sf /configuration/php.ini /etc/php/7.0/fpm/php.ini
 
+ADD https://raw.githubusercontent.com/vishnubob/wait-for-it/master/wait-for-it.sh /usr/bin/wait-for-it
+RUN chmod +x /usr/bin/wait-for-it
+
 EXPOSE 80
 
 CMD /usr/bin/supervisord -n

scripts/setup.sh

@@ -35,6 +35,7 @@ sed -i "s/@GCL_SMTP_USER@/$GCL_SMTP_USER/g" /etc/msmtprc
 sed -i "s/@GCL_SMTP_PASSWORD@/$GCL_SMTP_PASSWORD/g" /etc/msmtprc
 
 # Run maintenance scripts
+wait-for-it "$GCL_DB_HOST:3306" --timeout=60
 cd $WIKI_SOURCE/maintenance
 php update.php