add cronjob to renew certs if necessary

Author: sopitz

Dockerfile

@@ -1,10 +1,13 @@
 FROM jwilder/nginx-proxy:0.2.0
 
-RUN apt-get update && apt-get install -y git && apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+RUN apt-get update && apt-get install -y git cron vim && apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+RUN systemctl enable cron
 RUN cd / && git clone https://github.com/letsencrypt/letsencrypt
 
 COPY etc /etc
 COPY ssl.tmpl /app/
 COPY createSSL.sh /
 RUN chmod +x /createSSL.sh
 COPY Procfile /app/Procfile
+COPY cronfile /app/cronfile
+RUN crontab /app/cronfile

Procfile

@@ -1,3 +1,4 @@
 nginx: nginx
 confgen: docker-gen -watch -only-exposed -notify "nginx -s reload" /app/nginx.tmpl /etc/nginx/conf.d/default.conf
 sslgen: docker-gen -watch -only-exposed -notify "/createSSL.sh" /app/ssl.tmpl /createSSL.sh
+cron: /usr/sbin/cron -f 

cronfile

@@ -0,0 +1 @@
+00 10 * * * docker-gen -only-exposed -notify "/createSSL.sh" /app/ssl.tmpl /createSSL.sh