Update alpine base image in Dockerfile to 3.11

When building the extended version of Hugo using the Dockerfile and
`--build-arg HUGO_BUILD_TAGS=extended`, the obtained Docker container is
broken, because the source is build under alpine 3.11 and the compiled
binary is copied to an image based on alpine 3.10. This problem was most
likely introduced due to an update of the golang base image.

This commit changes the base image from alpine:3.10 to alpine:3.11,
fixing extended version builds.

diff --git a/Dockerfile b/Dockerfile
index 02a150992736c81e821eefd67d6719db947c4c5c..3ec305f7b7be69d78439aed60890e30bf33e7f51 100755 (executable)
--- a/Dockerfile
+++ b/Dockerfile
@@ -26,7 +26,7 @@ RUN mage hugo && mage install
 
 # ---
 
-FROM alpine:3.10
+FROM alpine:3.11
 
 COPY --from=build /go/bin/hugo /usr/bin/hugo