Upgrade base image to alpine 3.8.

Author: gizmoguy

Dockerfile

@@ -1,6 +1,6 @@
 ## Image name: faucet/base
 
-FROM alpine:3.7
+FROM alpine:3.8
 RUN apk add --no-cache bash su-exec
 COPY entrypoint.sh /usr/local/bin/entrypoint.sh
 ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]

Dockerfile.pi

@@ -1,6 +1,6 @@
 ## Image name: faucet/base-pi
 
-FROM multiarch/alpine:armhf-v3.7
+FROM multiarch/alpine:armhf-v3.8
 RUN apk add --no-cache bash su-exec
 COPY entrypoint.sh /usr/local/bin/entrypoint.sh
 ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]