Fix running docs site with docker (#5512)

* Update docs site local build

Clean up makefile

Ignore container-image.sentinel

Fix hugo server errors

Ignore files

Add makefile credit

* Indentation per feedback

* Address PR feedback. Remove sentinel file

* Remove change to .gitignore

site/Dockerfile

@@ -1,3 +1,46 @@
-FROM klakegg/hugo:ext-alpine
+# Credit to Julien Guyomard (https://github.com/jguyomard)
+# Credit to the Kubernetes Website team.
+# This Dockerfile is based on:
+# (https://github.com/kubernetes/website/blob/main/Dockerfile)
 
-RUN apk add git
+FROM docker.io/library/golang:1.20-alpine
+
+RUN apk add --no-cache \
+    curl \
+    gcc \
+    g++ \
+    musl-dev \
+    build-base \
+    libc6-compat
+
+ARG HUGO_VERSION
+
+RUN mkdir $HOME/src && \
+    cd $HOME/src && \
+    curl -L https://github.com/gohugoio/hugo/archive/refs/tags/v${HUGO_VERSION}.tar.gz | tar -xz && \
+    cd "hugo-${HUGO_VERSION}" && \
+    go install --tags extended
+
+FROM docker.io/library/golang:1.20-alpine
+
+RUN apk add --no-cache \
+    runuser \
+    git \
+    openssh-client \
+    rsync \
+    npm && \
+    npm install -D autoprefixer postcss-cli
+
+RUN mkdir -p /var/hugo && \
+    addgroup -Sg 1000 hugo && \
+    adduser -Sg hugo -u 1000 -h /var/hugo hugo && \
+    chown -R hugo: /var/hugo && \
+    runuser -u hugo -- git config --global --add safe.directory /src
+
+COPY --from=0 /go/bin/hugo /usr/local/bin/hugo
+
+WORKDIR /src
+
+USER hugo:hugo
+
+EXPOSE 1313