Juice-shop Dockerfile

in https://github.com/juice-shop/juice-shop,

What is wrong with this Dockerfile , and what are the missing stuffs?
, and what are the best practices?

and is there any web site to learning and training Dockerfile writing?

FROM node:20-buster as installer
COPY . /juice-shop
WORKDIR /juice-shop
RUN npm i -g typescript ts-node
RUN npm install --omit=dev --unsafe-perm
RUN npm dedupe
RUN rm -rf frontend/node_modules
RUN rm -rf frontend/.angular
RUN rm -rf frontend/src/assets
RUN mkdir logs
RUN chown -R 65532 logs
RUN chgrp -R 0 ftp/ frontend/dist/ logs/ data/ i18n/
RUN chmod -R g=u ftp/ frontend/dist/ logs/ data/ i18n/
RUN rm data/chatbot/botDefaultTrainingData.json || true
RUN rm ftp/legal.md || true
RUN rm i18n/*.json || true

ARG CYCLONEDX_NPM_VERSION=latest
RUN npm install -g @cyclonedx/cyclonedx-npm@$CYCLONEDX_NPM_VERSION
RUN npm run sbom

# workaround for libxmljs startup error
FROM node:20-buster as libxmljs-builder
WORKDIR /juice-shop
RUN apt-get update && apt-get install -y build-essential python3
COPY --from=installer /juice-shop/node_modules ./node_modules
RUN rm -rf node_modules/libxmljs2/build && 
  cd node_modules/libxmljs2 && 
  npm run build

FROM gcr.io/distroless/nodejs20-debian11
ARG BUILD_DATE
ARG VCS_REF
LABEL maintainer="Bjoern Kimminich <[email protected]>" 
    org.opencontainers.image.title="OWASP Juice Shop" 
    org.opencontainers.image.description="Probably the most modern and sophisticated insecure web application" 
    org.opencontainers.image.authors="Bjoern Kimminich <[email protected]>" 
    org.opencontainers.image.vendor="Open Web Application Security Project" 
    org.opencontainers.image.documentation="https://help.owasp-juice.shop" 
    org.opencontainers.image.licenses="MIT" 
    org.opencontainers.image.version="16.0.0" 
    org.opencontainers.image.url="https://owasp-juice.shop" 
    org.opencontainers.image.source="https://github.com/juice-shop/juice-shop" 
    org.opencontainers.image.revision=$VCS_REF 
    org.opencontainers.image.created=$BUILD_DATE
WORKDIR /juice-shop
COPY --from=installer --chown=65532:0 /juice-shop .
COPY --chown=65532:0 --from=libxmljs-builder /juice-shop/node_modules/libxmljs2 ./node_modules/libxmljs2
USER 65532
EXPOSE 3000
CMD ["/juice-shop/build/app.js"]