Docker: Upgrade to Alpine 3.11 (#24056)

* Docker: Upgrade to Alpine 3.11

packaging/docker/Dockerfile

@@ -1,4 +1,4 @@
-ARG BASE_IMAGE=alpine:3.10
+ARG BASE_IMAGE=alpine:3.11
 FROM ${BASE_IMAGE}
 
 ARG GRAFANA_TGZ="grafana-latest.linux-x64-musl.tar.gz"
@@ -24,7 +24,7 @@ ENV PATH=/usr/share/grafana/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bi
 WORKDIR $GF_PATHS_HOME
 
 RUN apk add --no-cache ca-certificates bash tzdata && \
-    apk add --no-cache --upgrade --repository=http://dl-cdn.alpinelinux.org/alpine/edge/main openssl musl-utils
+    apk add --no-cache --upgrade openssl musl-utils
 
 # Oracle Support for x86_64 only
 RUN if [ `arch` = "x86_64" ]; then \