chore(docker): fix casing of AS keyword to resolve linter warnings

Fixed Dockerfile lint warnings by standardizing the casing of the `AS` keyword in multi-stage builds. This aligns with best practices for Dockerfile formatting and improves compatibility with linting tools used in CI.

No functional changes were made — only formatting adjustments to suppress warnings and maintain clean build output.

Signed-off-by: Mehfooj <162735469+Savvythelegend@users.noreply.github.com>

Author: Savvythelegend

Dockerfile

@@ -1,63 +1,63 @@
 ARG GO_VERSION=1.21
 ARG HTMLTEST_VERSION=0.17.0
 
-FROM golang:${GO_VERSION}-alpine as base
+FROM golang:${GO_VERSION}-alpine AS base
 WORKDIR /src
 RUN apk --update add nodejs npm git gcompat
 
-FROM base as node
+FROM base AS node
 COPY package*.json .
 ENV NODE_ENV=production
 RUN npm install
 
-FROM base as hugo
+FROM base AS hugo
 ARG HUGO_VERSION=0.122.0
 ARG TARGETARCH
 WORKDIR /tmp/hugo
 RUN wget -O "hugo.tar.gz" "https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_extended_${HUGO_VERSION}_linux-${TARGETARCH}.tar.gz"
 RUN tar -xf "hugo.tar.gz" hugo
 
-FROM base as build-base
+FROM base AS build-base
 COPY --from=hugo /tmp/hugo/hugo /bin/hugo
 COPY --from=node /src/node_modules /src/node_modules
 COPY . .
 
-FROM build-base as dev
+FROM build-base AS dev
 
-FROM build-base as build
+FROM build-base AS build
 ARG HUGO_ENV
 ARG DOCS_URL
 RUN hugo --gc --minify -d /out -e $HUGO_ENV -b $DOCS_URL
 
-FROM scratch as release
+FROM scratch AS release
 COPY --from=build /out /
 
-FROM scratch as update-stats
+FROM scratch AS update-stats
 COPY --from=build /src/hugo_stats.json /hugo_stats.json
 
-FROM build as validate-stats
+FROM build AS validate-stats
 RUN <<EOF
 if [ -n "$(git status --porcelain -- hugo_stats.json)" ]; then
   echo >&2 'ERROR: hugo_stats.json differs. Update with `docker buildx bake update-stats`'
   exit 1
 fi
 EOF
 
-FROM davidanson/markdownlint-cli2:v0.12.1 as lint
+FROM davidanson/markdownlint-cli2:v0.12.1 AS lint
 USER root
 RUN --mount=type=bind,target=. \
     /usr/local/bin/markdownlint-cli2 \
     "content/**/*.md" \
     "#content/engine/release-notes/*.md" \
     "#content/desktop/previous-versions/*.md"
 
-FROM wjdp/htmltest:v${HTMLTEST_VERSION} as test
+FROM wjdp/htmltest:v${HTMLTEST_VERSION} AS test
 WORKDIR /test
 COPY --from=build /out ./public
 ADD .htmltest.yml .htmltest.yml
 RUN htmltest
 
-FROM build-base as update-modules
+FROM build-base AS update-modules
 ARG MODULE
 RUN <<"EOT"
 set -ex
@@ -71,21 +71,21 @@ fi
 EOT
 RUN hugo mod vendor
 
-FROM scratch as vendor
+FROM scratch AS vendor
 COPY --from=update-modules /src/_vendor /_vendor
 COPY --from=update-modules /src/go.* /
 
-FROM build-base as build-upstream
+FROM build-base AS build-upstream
 ARG UPSTREAM_MODULE_NAME
 ARG UPSTREAM_REPO
 ARG UPSTREAM_COMMIT
 ENV HUGO_MODULE_REPLACEMENTS="github.com/${UPSTREAM_MODULE_NAME} -> github.com/${UPSTREAM_REPO} ${UPSTREAM_COMMIT}"
 RUN hugo --ignoreVendorPaths "github.com/${UPSTREAM_MODULE_NAME}" -d /out
 
-FROM wjdp/htmltest:v${HTMLTEST_VERSION} as validate-upstream
+FROM wjdp/htmltest:v${HTMLTEST_VERSION} AS validate-upstream
 WORKDIR /test
 COPY --from=build-upstream /out ./public
 ADD .htmltest.yml .htmltest.yml
 RUN htmltest
 
-FROM dev
+FROM dev