gitlab-ci

.gitlab-ci.yml

+stages: ["prepare", "build"]
+
+prepare environment:
+  tags:
+    - linux
+  stage: prepare
+  image: docker
+  rules:
+    - changes:
+        - Dockerfile
+  script:
+    - docker build -t "$CI_REGISTRY_IMAGE/lazypp" .
+    - docker login -u gitlab-ci-token -p "$CI_JOB_TOKEN" "$CI_REGISTRY"
+    - docker push "$CI_REGISTRY_IMAGE/lazypp"
+
+build:
+  tags:
+    - linux
+  stage: build
+  image: "$CI_REGISTRY_IMAGE/lazypp"
+  script:
+    - act

Dockerfile

+FROM ubuntu
+COPY .actrc /root
+RUN apt-get update && apt-get install --yes curl
+RUN curl https://raw.githubusercontent.com/nektos/act/master/install.sh | bash
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