Revert "use alpine instead of debian"

This reverts commit 6e6f898.

Dockerfile

@@ -1,6 +1,15 @@
-FROM alpine:edge
+FROM debian:stable-slim
 
-RUN apk add minify yq bash perl coreutils
+RUN DEBIAN_FRONTEND=noninteractive apt-get update &&\
+  apt-get install -y wget &&\
+  wget https://github.com/mikefarah/yq/releases/download/v4.30.8/yq_linux_amd64 &&\
+  chmod a+x yq_linux_amd64 &&\
+  mv yq_linux_amd64 /usr/bin/yq &&\
+  wget https://github.com/tdewolff/minify/releases/download/v2.12.4/minify_linux_amd64.tar.gz &&\
+  tar -xzf minify_linux_amd64.tar.gz &&\
+  chmod a+x minify &&\
+  mv minify /usr/bin/ &&\
+  apt-get autoremove -y && apt-get clean -y
 
 COPY main.sh /main.sh
 COPY gen.sh /gen.sh