build: Apply the latest template update

Author: alpha3166

docker/sample-dev/Dockerfile

@@ -1,9 +1,15 @@
 FROM alpine
+
+RUN apk update && \
+    apk upgrade
+
 ARG USERNAME=me
 RUN addgroup -g 1000 $USERNAME && \
     adduser -u 1000 -G $USERNAME -D $USERNAME
-RUN apk --update-cache add sudo && \
+RUN apk add sudo && \
     echo "$USERNAME ALL=(ALL) NOPASSWD: ALL" > /etc/sudoers.d/$USERNAME
+
 RUN apk add git less
 RUN apk add npm
+
 USER $USERNAME