Won't build using Node LTS on Debian 10

[chrisdlangton]

reproduce using

FROM --platform=amd64 debian:buster-slim
ARG DEBIAN_FRONTEND=noninteractive

WORKDIR /srv/app

RUN apt-get update && \
    apt-get install -y --no-install-recommends -q apt-utils && \
    apt-get install -y --no-install-recommends \
    make git curl wget software-properties-common && \
    curl -sL https://deb.nodesource.com/setup_12.x | bash - && \
    apt-get install -y --no-install-recommends -q nodejs && \
    git clone -q --progress --no-hardlinks https://github.com/tensult/cloud-reports.git && \
    cd /srv/app/cloud-reports && \
    npm run build && \
    npm cache clean --force

CMD [ "bash" ]

for those passing by and not actually caring to reproduce it themselves, the following errors occur;

added 1328 packages from 1044 contributors and audited 33329 packages in 33.383s

26 packages are looking for funding
  run `npm fund` for details

found 88 low severity vulnerabilities
  run `npm audit fix` to fix them, or `npm audit` for details

> cloud-reports-final-report@0.1.0 ng /srv/app/cloud-reports/src/reporters/html
> ng "build" "--prod"

Schema validation failed with the following errors:
  Data path ".builders['app-shell']" should have required property 'class'.
Error: Schema validation failed with the following errors:
  Data path ".builders['app-shell']" should have required property 'class'.
    at MergeMapSubscriber.project (/srv/app/cloud-reports/src/reporters/html/node_modules/@angular/cli/node_modules/@angular-devkit/core/src/workspace/workspace.js:173:42)
    at MergeMapSubscriber._tryNext (/srv/app/cloud-reports/src/reporters/html/node_modules/rxjs/internal/operators/mergeMap.js:122:27)
    at MergeMapSubscriber._next (/srv/app/cloud-reports/src/reporters/html/node_modules/rxjs/internal/operators/mergeMap.js:112:18)
    at MergeMapSubscriber.Subscriber.next (/srv/app/cloud-reports/src/reporters/html/node_modules/rxjs/internal/Subscriber.js:103:18)
    at MergeMapSubscriber.notifyNext (/srv/app/cloud-reports/src/reporters/html/node_modules/rxjs/internal/operators/mergeMap.js:141:26)
    at InnerSubscriber._next (/srv/app/cloud-reports/src/reporters/html/node_modules/rxjs/internal/InnerSubscriber.js:30:21)
    at InnerSubscriber.Subscriber.next (/srv/app/cloud-reports/src/reporters/html/node_modules/rxjs/internal/Subscriber.js:103:18)
    at MapSubscriber._next (/srv/app/cloud-reports/src/reporters/html/node_modules/rxjs/internal/operators/map.js:92:26)
    at MapSubscriber.Subscriber.next (/srv/app/cloud-reports/src/reporters/html/node_modules/rxjs/internal/Subscriber.js:103:18)
    at SwitchMapSubscriber.notifyNext (/srv/app/cloud-reports/src/reporters/html/node_modules/rxjs/internal/operators/switchMap.js:122:26)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! cloud-reports-final-report@0.1.0 ng: `ng "build" "--prod"`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the cloud-reports-final-report@0.1.0 ng script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2020-04-09T07_13_19_127Z-debug.log
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! cloud-reports@1.6.4 build: `npm install && npm run copy-ejs && tsc && cd src/reporters/html && npm install && npm run ng build --  --prod && cd ../../..`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the cloud-reports@1.6.4 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2020-04-09T07_13_19_144Z-debug.log

I'm looking for advice to fix it myself, guidance for a PR (i have no clue what's going on here), or acknowledgement of the bug and therefore will be fixed soon.