diff --git a/Dockerfile b/Dockerfile
index 902d39a..a68f051 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,17 +1,15 @@
 #Dockerfile for a Postfix email relay service
+# hadolint ignore=DL3007
 FROM alpine:latest
-MAINTAINER Juan Luis Baptiste juan.baptiste@gmail.com
-
-RUN apk update && \
+# hadolint ignore=DL3018,
+RUN apk update --no-cache && \
     apk add bash gawk cyrus-sasl cyrus-sasl-login cyrus-sasl-crammd5 mailx \
     postfix && \
-    rm -rf /var/cache/apk/* && \
     mkdir -p /var/log/supervisor/ /var/run/supervisor/ && \
     sed -i -e 's/inet_interfaces = localhost/inet_interfaces = all/g' /etc/postfix/main.cf
 
 COPY run.sh /
-RUN chmod +x /run.sh
-RUN newaliases
+RUN chmod +x /run.sh && newaliases
 
 EXPOSE 25
 #ENTRYPOINT ["/run.sh"]