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docs: examples moved to docs website
Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>
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# Test your image before pushing it
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In some cases, you might want to validate that the image works as expected
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before pushing it.
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The workflow below will be composed of several steps to achieve this:
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* Build and export the image to Docker
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* Test your image
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* Multi-platform build and push the image
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```yaml
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name: ci
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on:
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push:
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branches:
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- 'main'
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env:
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TEST_TAG: user/app:test
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LATEST_TAG: user/app:latest
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jobs:
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docker:
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runs-on: ubuntu-latest
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steps:
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-
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name: Checkout
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uses: actions/checkout@v3
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-
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name: Set up QEMU
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uses: docker/setup-qemu-action@v2
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-
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name: Set up Docker Buildx
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uses: docker/setup-buildx-action@v2
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-
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name: Login to Docker Hub
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uses: docker/login-action@v2
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with:
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username: ${{ secrets.DOCKERHUB_USERNAME }}
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password: ${{ secrets.DOCKERHUB_TOKEN }}
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-
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name: Build and export to Docker
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uses: docker/build-push-action@v3
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with:
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context: .
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load: true
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tags: ${{ env.TEST_TAG }}
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-
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name: Test
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run: |
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docker run --rm ${{ env.TEST_TAG }}
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-
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name: Build and push
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uses: docker/build-push-action@v3
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with:
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context: .
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platforms: linux/amd64,linux/arm64
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push: true
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tags: ${{ env.LATEST_TAG }}
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```
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> **Note**
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>
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> Build time will not be increased with this workflow because internal cache
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> for `linux/amd64` will be used from previous step on `Build and push` step
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> so only `linux/arm64` will be actually built.
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This page has moved to [Docker Docs website](https://docs.docker.com/build/ci/github-actions/examples/#test-your-image-before-pushing-it)
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