fix: build markdownlint-ci from source code

Dockerfile

@@ -1,18 +1,15 @@
-FROM docker.io/library/alpine:3.12
+FROM docker.io/library/node:lts-alpine3.15 AS build
 
-ARG NODEJS_VERSION=12.22.6-r0
 ARG MARKDOWNLINT_VERSION
 
 RUN set -ex && \
-    apk add --no-cache nodejs=${NODEJS_VERSION} nodejs-npm=${NODEJS_VERSION}
+    apk update && \
+    apk upgrade && \
+    apk add --no-cache git
 
-RUN if [ ! -z "${MARKDOWNLINT_VERSION}" ]; then set -ex; npm install -g markdownlint-cli@${MARKDOWNLINT_VERSION}; fi
-RUN if [ -z "${MARKDOWNLINT_VERSION}" ]; then set -ex; npm install -g markdownlint-cli; fi
+RUN git clone --branch ${MARKDOWNLINT_VERSION} https://github.com/igorshubovych/markdownlint-cli /markdownlint && \
+    cd /markdownlint && \
+    npm install --production && \
+    npm install --global
 
-RUN set -ex && \
-    npm cache clean --force && \
-    apk del nodejs-npm
-
-WORKDIR /work
-ENTRYPOINT ["/usr/bin/markdownlint"]
-CMD ["."]
+ENTRYPOINT [ "/usr/local/bin/markdownlint" ]