chore: Improve contrib docs, add template workflows (#260)

* chore: Improve contrib docs, add template workflows

* Update CONTRIBUTING.md

Co-authored-by: Vadim Makeev <hi@pepelsbey.dev>

---------

Co-authored-by: Vadim Makeev <hi@pepelsbey.dev>

.github/CODEOWNERS

@@ -0,0 +1,9 @@
+# This file is used to request PR reviews from the appropriate team.
+#
+# Order is important; the last matching pattern takes precedence.
+# Each rule is more specific than the previous rules.
+# For more information, see:
+# https://docs.github.com/en/free-pro-team@latest/github/creating-cloning-and-archiving-repositories/about-code-owners
+
+# Default
+* @mdn/core-yari-content

.github/ISSUE_TEMPLATE/bug.yml

@@ -0,0 +1,36 @@
+name: "Issue report"
+description: Report an unexpected problem or unintended behavior.
+labels: ["needs triage"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        ### Before you start
+
+        **Want to fix the problem yourself?** This project is open source and we welcome fixes and improvements from the community!
+
+        ↩ Check the project [CONTRIBUTING.md](../blob/main/CONTRIBUTING.md) guide to see how to get started.
+
+        ---
+  - type: textarea
+    id: problem
+    attributes:
+      label: What information was incorrect, unhelpful, or incomplete?
+    validations:
+      required: true
+  - type: textarea
+    id: expected
+    attributes:
+      label: What did you expect to see?
+    validations:
+      required: true
+  - type: textarea
+    id: references
+    attributes:
+      label: Do you have any supporting links, references, or citations?
+      description: Link to information that helps us confirm your issue.
+  - type: textarea
+    id: more-info
+    attributes:
+      label: Do you have anything more you want to share?
+      description: For example, steps to reproduce, screenshots, screen recordings, or sample code.

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,8 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Content or feature request
+    url: https://github.com/mdn/mdn/issues/new/choose
+    about: Propose new content for MDN Web Docs or submit a feature request using this link.
+  - name: MDN GitHub Discussions
+    url: https://github.com/orgs/mdn/discussions
+    about: Does your topic involve a lot of pages, or are you not sure how it can be split into actionable tasks? Consider starting a discussion first.

.github/workflows/codeql.yml

@@ -0,0 +1,41 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [main]
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    if: github.repository == 'mdn/dom-examples'
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: ["javascript"]
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      # Initializes the CodeQL tools for scanning.
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: ${{ matrix.language }}
+
+      # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+      # If this step fails, then you should remove it and run the build manually (see below)
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@v3
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3

.github/workflows/pr-merge-conflicts.yml

@@ -0,0 +1,14 @@
+name: "Label PRs with conflicts"
+
+on:
+  push:
+  pull_request_target:
+    types: [synchronize]
+
+jobs:
+  label-merge-conflicts:
+    uses: mdn/workflows/.github/workflows/pr-rebase-needed.yml@main
+    with:
+      target-repo: "mdn/dom-examples"
+    secrets:
+      GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

CONTRIBUTING.md

@@ -0,0 +1,55 @@
+# Contribution guide
+
+The "dom-examples" repository accompany various MDN DOM and Web API documentation pages on [MDN Web Docs](https://developer.mozilla.org).
+This document will help you get started with contributions!
+
+## Types of contribution
+
+> [!NOTE]
+> You can include an example directly in MDN pages using [`{{EmbedLiveSample()}}` macros](https://developer.mozilla.org/en-US/docs/MDN/Writing_guidelines/Page_structures/Macros/Commonly_used_macros#code_samples) or regular Markdown code blocks.
+> These methods are simpler to maintain as the code lives beside the rest of the content.
+> Only add examples to this repository if your example doesn't easily run on MDN pages for technical or security reasons.
+
+There are many ways you can help improve this repository! For example:
+
+- **Write a new example.** If you would like to add a new example, make sure this feature is supported by a stable version of modern browsers.
+- **Improve an existing example.** You could make improvements or add some other changes which would make example more helpful to the users.
+- **Fix a bug:** we have a list of [issues](https://github.com/mdn/dom-examples/issues), or maybe you found your own.
+
+## Getting started
+
+You will need to have Git and GitHub set up to be able to contribute.
+
+### Set up Git and GitHub
+
+For more information on setting up Git on your machine, [read this article](https://help.github.com/articles/set-up-git/).
+With the above dependencies satisfied, [create your new account on GitHub](https://github.com/join).
+
+Next up, you need to fork and clone the repo to be able to contribute to it.
+You can [learn about forking on GitHub](https://help.github.com/articles/fork-a-repo).
+Once you have your own fork, [clone it to your local machine](https://help.github.com/articles/cloning-a-repository/).
+
+### Serving
+
+You should serve your example locally to see the results before submitting your changes.
+There are a few different ways to do this depending on your preferred tooling methods.
+See [Running a simple local HTTP server](https://developer.mozilla.org/en-US/docs/Learn/Common_questions/Tools_and_setup/set_up_a_local_testing_server#running_a_simple_local_http_server) for information on setting up a server.
+
+```bash
+cd my-cool-example
+python3 -m http.server
+```
+
+### Open a pull request
+
+Once you're satisfied, the final step is to [submit your pull request](https://help.github.com/articles/creating-a-pull-request/).
+You can find more information about submitting pull requests in our [Community guidelines](https://developer.mozilla.org/en-US/docs/MDN/Community/Pull_requests) docs.
+
+### Including your example on MDN
+
+After your pull request is reviewed and merged, you can publish your example on MDN Web Docs.
+
+## Thank you
+
+Thanks a lot for your contribution!
+If you'd like to ask questions or get in touch, feel free to drop by in [Discord](https://developer.mozilla.org/discord) or say hello in one of [our communication channels](https://developer.mozilla.org/en-US/docs/MDN/Community/Communication_channels).

README.md

@@ -2,6 +2,13 @@
 
 Code examples that accompany various MDN DOM and Web API documentation pages.
 
+> [!NOTE]
+> You can include an example directly in MDN pages using [`{{EmbedLiveSample()}}` macros](https://developer.mozilla.org/en-US/docs/MDN/Writing_guidelines/Page_structures/Macros/Commonly_used_macros#code_samples) or regular Markdown code blocks.
+> These methods are simpler to maintain as the code lives beside the rest of the content.
+> Only add examples to this repository if your example doesn't easily run on MDN pages for technical or security reasons.
+
+## Repository contents
+
 - The "abort-api" directory contains an example of how to use the "Abort API" (aka [AbortSignal](https://dom.spec.whatwg.org/#interface-AbortSignal) and [AbortController](https://dom.spec.whatwg.org/#interface-abortcontroller)). [Run the example live](https://mdn.github.io/dom-examples/abort-api/).
 
 - The "audiocontext-setsinkid" directory contains an example of how to use the [`AudioContext.setSinkId()`](https://developer.mozilla.org/docs/Web/API/AudioContext/setSinkId) method and related features. [Run the example live](https://mdn.github.io/dom-examples/audiocontext-setsinkid/).
@@ -44,7 +51,7 @@ Code examples that accompany various MDN DOM and Web API documentation pages.
 
 - The "popover-api" directory is for examples and demos of the [Popover API](https://developer.mozilla.org/docs/Web/API/Popover_API) standard. Go to the [Popover API demo index](popover-api/) to see what's available.
 
-- The "reporting-api" directory contains a couple of basic demos to show usage of the Reprting API. You can find more explanation of how the API works in the main MDN [Reporting API](https://developer.mozilla.org/docs/Web/API/Reporting_API) docs. [Run the deprecation report demo live](https://mdn.github.io/dom-examples/reporting-api/deprecation_report.html).
+- The "reporting-api" directory contains a couple of basic demos to show usage of the Reporting API. You can find more explanation of how the API works in the main MDN [Reporting API](https://developer.mozilla.org/docs/Web/API/Reporting_API) docs. [Run the deprecation report demo live](https://mdn.github.io/dom-examples/reporting-api/deprecation_report.html).
 
 - The "resize-event" directory contains a basic demo to show how you can use the [resize event](https://developer.mozilla.org/docs/Web/API/Window/resize_event). Resize the browser window either by height or width to see the size of your current window. [Run the demo live](https://mdn.github.io/dom-examples/resize-event).
 
@@ -79,3 +86,17 @@ Code examples that accompany various MDN DOM and Web API documentation pages.
 - The "webgpu-render-demo" directory contains an example that demonstrates basic usage of the [WebGPU API](https://developer.mozilla.org/docs/Web/API/WebGPU_API) render pipeline, which is used for rendering high-performance graphics via the GPU. [View the demo live](https://mdn.github.io/dom-examples/webgpu-render-demo/).
 
 - The "window-management-api" directory contains a basic demo to show usage of the [Window Management API](https://developer.mozilla.org/docs/Web/API/Window_Management_API). [View the demo live](https://mdn.github.io/dom-examples/window-management-api/).
+
+## Contribute to MDN Web Docs
+
+You can contribute to MDN Web Docs and be a part of our community through content contributions, engineering, or translation work.
+The MDN Web Docs project welcomes contributions from everyone who shares our goals and wants to contribute constructively and respectfully within our community.
+
+To find out how to get started, see the [CONTRIBUTING.md](CONTRIBUTING.md) document in this repository.
+By participating in and contributing to our projects and discussions, you acknowledge that you have read and agree to our [Code of Conduct](CODE_OF_CONDUCT.md).
+
+## Get in touch
+
+You can communicate with the MDN Web Docs team and community using the [communication channels][].
+
+[communication channels]: https://developer.mozilla.org/en-US/docs/MDN/Community/Communication_channels