Updated to use postgres image.

Dockerfile

@@ -1,8 +1,10 @@
-FROM alpine:3.4
-MAINTAINER Pau Rodriguez-Estivill "prodrigestivill@gmail.com"
+FROM postgres
 
-ADD install.sh install.sh
-RUN sh install.sh && rm install.sh
+RUN set -x \
+	&& apt-get update && apt-get install -y --no-install-recommends ca-certificates curl && rm -rf /var/lib/apt/lists/* \
+	&& curl -L https://github.com/odise/go-cron/releases/download/v0.0.7/go-cron-linux.gz | zcat > /usr/local/bin/go-cron \
+	&& chmod a+x /usr/local/bin/go-cron \
+	&& apt-get purge -y --auto-remove ca-certificates && apt-get clean
 
 ENV POSTGRES_DB **None**
 ENV POSTGRES_HOST **None**
@@ -10,13 +12,18 @@ ENV POSTGRES_PORT 5432
 ENV POSTGRES_USER **None**
 ENV POSTGRES_PASSWORD **None**
 ENV POSTGRES_EXTRA_OPTS '-Z9'
-ENV SCHEDULE **None**
+ENV SCHEDULE '@daily'
 ENV BACKUP_DIR '/backups'
 ENV BACKUP_KEEP_DAYS 7
 ENV BACKUP_KEEP_WEEKS 4
 ENV BACKUP_KEEP_MONTHS 6
 
-ADD run.sh run.sh
-ADD backup.sh backup.sh
+COPY backup.sh /backup.sh
 
-CMD ["sh", "run.sh"]
+VOLUME /backups
+
+ENTRYPOINT ["/bin/sh", "-c"]
+CMD ["exec /usr/local/bin/go-cron -s \"$SCHEDULE\" -p 80 -- /backup.sh"]
+
+HEALTHCHECK --interval=5m --timeout=3s \
+  CMD curl -f http://localhost/ || exit 1