From 788af246c55a97be4bae42e06e69a0c36fc33e2b Mon Sep 17 00:00:00 2001
From: kaffarell <gabrielgoller123@gmail.com>
Date: Mon, 11 Jul 2022 23:25:23 +0200
Subject: [PATCH] :twisted_rightwards_arrows: Applied changes from alex-cannon
 pr #9109

---
 .dockerignore   |  3 +++
 CHANGELOG.md    |  2 ++
 CONTRIBUTING.md | 22 ++++++++++++++++++++++
 Dockerfile      | 24 ++++++++++++++++++++++++
 4 files changed, 51 insertions(+)
 create mode 100644 .dockerignore
 create mode 100644 Dockerfile

diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 000000000000..e25a73be14f7
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,3 @@
+# Reference: https://docs.docker.com/engine/reference/builder/#dockerignore-file
+# Exclude node_modules
+node_modules
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 670867b065e9..45acc50900c4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,8 @@
 ### Chore & Maintenance
 
 - `[*]` Replace internal usage of `pretty-format/ConvertAnsi` with `jest-serializer-ansi-escapes` ([#12935](https://github.com/facebook/jest/pull/12935), [#13004](https://github.com/facebook/jest/pull/13004))
+- `[*]` Added Dockerfile for Jest Development ([#9109](https://github.com/facebook/jest/pull/9109))
+
 
 ### Performance
 
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index aa0ccdb5b328..c4fd4fe76f66 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -33,6 +33,28 @@ _Before_ submitting a pull request, please make sure the following is done…
     ```
 
     Note: Replace `<your_username>` with your GitHub username
+1.  Run Jest with [Docker](https://docs.docker.com/engine/docker-overview/) (Optional) or continue reading for manual instructions.
+
+    1. If you haven't already, [Install Docker](https://docs.docker.com/install/).
+
+    1. Navigate to the `/jest` directory. You should be able to see the `Dockerfile` file when you run `ls`.
+
+    1. Build the Jest image (may take a few minutes):
+
+    ```sh
+    docker build -t jest .
+    ```
+
+    1. Run the Jest image:
+
+    ```sh
+    docker run --volume="YOUR_PATH_TO_JEST:/usr/src/app" --rm jest:latest
+    ```
+
+    1. The `yarn run watch` command will watch the `/packages` directory for file changes. See `package.json` for a full list of commands. [Learn how to run commands in a container](https://docs.docker.com/engine/reference/commandline/exec/) or visit the [official Docker docs](https://docs.docker.com/) for other Docker related questions.
+
+    1. **Skip to step #8 and continue reading.**
+
 
 1.  Jest uses [Yarn](https://code.facebook.com/posts/1840075619545360) for running development scripts. If you haven't already done so, please [install yarn](https://yarnpkg.com/en/docs/install).
 
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 000000000000..72a300808d2e
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,24 @@
+#Build: docker build -t jest .
+#Run: docker run --volume="$PWD:/usr/src/app" --rm jest:latest
+
+#Use Node 12.13.0 image
+#Includes Python2.7
+FROM node:12
+
+#Setup basic environment
+ENV DEBIAN_FRONTEND=noninteractive \
+    LANG=en_US.UTF-8 \
+    LC_ALL=C.UTF-8 \
+    LANGUAGE=en_US.UTF-8
+
+WORKDIR /usr/src/app
+
+#Copy entire directory
+COPY . ./
+
+#Install dependencies
+RUN yarn
+
+#Build && Watch for changes
+ENTRYPOINT ["yarn"]
+CMD ["watch"]
\ No newline at end of file