on: [push]
jobs:
  build:
    env:
      RUNNER_TOOL_CACHE: /toolcache
    runs-on: docker
    steps:
      - run: ls -l /
      - run: ls -l /opt
      - run: echo 'lol' >> /opt/hostedtoolcache/omg.txt
      - run: cat /opt/hostedtoolcache/omg.txt