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[Issue 15934] Update get started dockerfile steps (#15944)

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* update dockerfile steps
This commit is contained in:
Craig Osterhout
2022-10-21 14:24:10 -07:00
committed by GitHub
parent a6ca0f3a42
commit f01d1bc739
1 changed files with 37 additions and 8 deletions
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get-started/02_our_app.md
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@@ -35,12 +35,40 @@ we have created a ZIP file containing the application.
## Build the app's container image
In order to build the application, we need to use a `Dockerfile`. A
Dockerfile is simply a text-based script of instructions that is used to
create a container image. If you've created Dockerfiles before, you might
see a few flaws in the Dockerfile below. But, don't worry. We'll go over them.
In order to build the application, you'll need to use a `Dockerfile`. A
Dockerfile is simply a text-based file with no file extension. A Dockerfile contains a script of instructions that are used to create a container image.
1. In the `app` folder, the same location as the `package.json` file, create a file named `Dockerfile` with the following contents.
1. In the `app` folder, the same location as the `package.json` file, create a file named `Dockerfile`. You can use the following commands below to create a Dockerfile based on your operating system.
<ul class="nav nav-tabs">
<li class="active"><a data-toggle="tab" data-target="#mac-linux">Mac / Linux</a></li>
<li><a data-toggle="tab" data-target="#windows">Windows</a></li>
</ul>
<div class="tab-content">
<div id="mac-linux" class="tab-pane fade in active" markdown="1">
In the terminal, run the following commands listed below.
```console
$ cd /path/to/app
$ touch Dockerfile
```
<hr>
</div>
<div id="windows" class="tab-pane fade" markdown="1">
In the Windows Command Prompt, run the following commands listed below.
```console
$ cd \path\to\app
$ type nul > Dockerfile
```
<hr>
</div>
</div>
2. Add the following contents to the Dockerfile. If you've created Dockerfiles before, you might see a few flaws in the Dockerfile below. But, don't worry. We'll go over them.
```dockerfile
# syntax=docker/dockerfile:1
@@ -52,10 +80,11 @@ see a few flaws in the Dockerfile below. But, don't worry. We'll go over them.
CMD ["node", "src/index.js"]
EXPOSE 3000
```
> **Note**
>
> Select an instruction in the Dockerfile example to learn more about the instruction.
Please check that the file `Dockerfile` has no file extension like `.txt`. Some editors may append this file extension automatically and this would result in an error in the next step.
2. Open a terminal and go to the `app` directory with the `Dockerfile`. Now build the container image using the `docker build` command.
3. Open a terminal and go to the `app` directory with the `Dockerfile`. Now build the container image using the `docker build` command.
```console
$ docker build -t getting-started .