fix Dockerfile (#10312)

Dockerfile

@@ -12,15 +12,15 @@ RUN apk add --no-cache \
     curl \
     git \
     openssh-client \
-    rsync
+    rsync \
+    build-base \
+    libc6-compat
 
 ARG HUGO_VERSION
 
 RUN mkdir -p /usr/local/src && \
     cd /usr/local/src && \
     curl -L https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_extended_${HUGO_VERSION}_linux-64bit.tar.gz | tar -xz && \
-    apk add build-base && \
-    apk add libc6-compat && \
     mv hugo /usr/local/bin/hugo && \
     curl -L https://bin.equinox.io/c/dhgbqpS8Bvy/minify-stable-linux-amd64.tgz | tar -xz && \
     mv minify /usr/local/bin && \