Docker runner fails "no space left on device"

GitLab CI/CD
,
1

I am using GitLab.com and a docker runner in there (ubuntu-2gb-hel1-1). Searching answers from Google offers a lot of solutions but none of them have helped me so far. The error started to happen suddenly and affects all 5 repos in this particular project.

I have tried a couple of things already. I ran docker system prune -f and docker info but everything seems to be fine and there should be enough free space during the running of docker build command. I also emptied all container registries of the project. Repos are all far less than 0,5gb.

The error I keep getting when running my pipeline:

write /var/lib/docker/tmp/GetImageBlob040699619: no space left on device
ERROR: Job failed: exit code 1

.gitlab-ci.yml (The error occurs during the release stage and at the end of the docker build command).

variables:
  NODE_VERSION: 10
  DOCKER_DRIVER: overlay2
  DOCKER_TLS_CERTDIR: ''
  CONTAINER_IMAGE: ${CI_REGISTRY}/${CI_PROJECT_PATH}:${CI_COMMIT_SHA}
  CONTAINER_IMAGE_LATEST: ${CI_REGISTRY}/${CI_PROJECT_PATH}:${CI_COMMIT_REF_NAME}
  AWS_CONTAINER_IMAGE: ${AWS_ECR}/${CI_PROJECT_PATH}:${CI_COMMIT_SHA}
  AWS_CONTAINER_IMAGE_LATEST: ${AWS_ECR}/${CI_PROJECT_PATH}:${CI_COMMIT_REF_NAME}

cache:
  untracked: true
  key: "$CI_BUILD_REF_NAME"
  paths:
    - node_modules/

stages:
  - release

release:
  stage: release
  image: docker:latest
  services:
    - docker:dind
  before_script:
    - echo "$CI_REGISTRY_PASSWORD" | docker login -u "$CI_REGISTRY_USER" "$CI_REGISTRY" --password-stdin
  script:
    - docker build -t ${CONTAINER_IMAGE} .
    - docker tag ${CONTAINER_IMAGE} ${CONTAINER_IMAGE_LATEST}
    - docker push ${CONTAINER_IMAGE}
    - docker push ${CONTAINER_IMAGE_LATEST}
  only:
    - master
  tags:
    - docker

Dockerfile

FROM node:10
ADD . /code
WORKDIR /code
RUN yarn
EXPOSE 3030
CMD ["yarn","start"]

Thank you all for your help!