auto db backup script

config/mysql/Dockerfile

@@ -0,0 +1,10 @@
+FROM mysql:5
+ENV force_color_prompt yes
+
+RUN apt-get update;
+RUN apt-get install -y cron;
+
+ENTRYPOINT \
+  service cron start; \
+  printenv | grep -v "no_proxy" >> /etc/environment; \
+  docker-entrypoint.sh mysqld