message: Install typescript globally in installer image
diff: FROM node:12 as installer
  COPY . /juice-shop
  WORKDIR /juice-shop
  +RUN npm i -g typescript ts-node
  RUN npm install --production --unsafe-perm
  RUN npm dedupe
  RUN rm -rf frontend/node_modules
  @@ -26,8 +27,8 @@ RUN addgroup --system --gid 1001 juicer && \
  COPY --from=installer --chown=juicer /juice-shop .
  RUN mkdir logs && \
  chown -R juicer logs && \
  - chgrp -R 0 ftp/ frontend/dist/ logs/ data/ i18n/ build/ && \
  - chmod -R g=u ftp/ frontend/dist/ logs/ data/ i18n/ build/
  + chgrp -R 0 ftp/ frontend/dist/ logs/ data/ i18n/ && \
  + chmod -R g=u ftp/ frontend/dist/ logs/ data/ i18n/
  USER 1001
  EXPOSE 3000
  CMD ["npm", "start"]
  