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58 lines
2 KiB
Markdown
58 lines
2 KiB
Markdown
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[](https://deploy.now.sh/?repo=https://github.com/zeit/next.js/tree/master/examples/with-docker&env=API_URL&docker=true)
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# With Docker
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## How to use
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### Using `create-next-app`
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Execute [`create-next-app`](https://github.com/segmentio/create-next-app) with [Yarn](https://yarnpkg.com/lang/en/docs/cli/create/) or [npx](https://github.com/zkat/npx#readme) to bootstrap the example:
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```bash
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npx create-next-app --example with-docker with-docker-app
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# or
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yarn create next-app --example with-docker with-docker-app
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```
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### Download manually
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Download the example [or clone the repo](https://github.com/zeit/next.js):
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```bash
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curl https://codeload.github.com/zeit/next.js/tar.gz/canary | tar -xz --strip=2 next.js-canary/examples/with-docker
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cd with-docker
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```
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Build it with docker:
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```bash
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# build
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docker build -t next-app .
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# or, use multi-stage builds to build a smaller docker image
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docker build -t next-app -f ./Dockerfile.multistage .
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```
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Run it:
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```bash
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docker run --rm -it \
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-p 3000:3000 \
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-e "API_URL=https://example.com" \
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next-app
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```
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Deploy it to the cloud with [now](https://zeit.co/now) ([download](https://zeit.co/download))
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```bash
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now --docker -e API_URL="https://example.com"
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```
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>*Note: Multi-stage only works in OSS plan. [\[#962\]](https://github.com/zeit/now-cli/issues/962#issuecomment-383860104)*
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## The idea behind the example
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This example show how to set custom environment variables for your __docker application__ at runtime.
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The `dockerfile` is the simplest way to run Next.js app in docker, and the size of output image is `173MB`. However, for an even smaller build, you can do multi-stage builds with `dockerfile.multistage`. The size of output image is `85MB`.
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You can check the [Example Dockerfile for your own Node.js project](https://github.com/mhart/alpine-node/tree/43ca9e4bc97af3b1f124d27a2cee002d5f7d1b32#example-dockerfile-for-your-own-nodejs-project) section in [mhart/alpine-node](https://github.com/mhart/alpine-node) for more details.
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