Add starter slides.

Add a README and copy the workflow to build on GitHub actions.

.github/workflows/marp.yml

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+name: marp-to-pages
+concurrency: marp-to-pages
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+    steps:
+
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Ensure build dir exists
+        run: mkdir -p build
+
+      - name: Copy images directory
+        run: cp -R assets build/assets
+
+      - name: Marp Build
+        uses: docker://marpteam/marp-cli:v3.0.2
+        with:
+          args: slides.md --html -o build/index.html
+        env:
+          MARP_USER: root:root
+
+      - name: Deploy preview
+        if: ${{ github.event_name == 'pull_request' }}
+        uses: rossjrw/pr-preview-action@v1
+        with:
+          source-dir: ./build/
+          preview-branch: gh-pages
+          umbrella-dir: pr-preview
+
+      - name: Deploy production
+        if: ${{ github.event_name == 'push' }}
+        uses: JamesIves/github-pages-deploy-action@v4
+        with:
+          branch: gh-pages
+          folder: ./build/
+          clean-exclude: pr-preview/
+

.gitignore

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+*.html
+.DS_Store
+slides.pdf

README.md

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+# UCL talk template with [marp](https://marp.app/)
+
+This is my very minimalist template for UCL talks using [marp](https://marp.app/)/[marpit](https://marpit.marp.app/).  Anyone in UCL is welcome to use the template! If you're not from UCL then please remove the UCL branding.
+
+## How to use this template
+
+1. Follow [the instructions for creating a new repository from a template](https://docs.github.com/en/repositories/creating-and-managing-repositories/creating-a-repository-from-a-template) (**tl; dr** click on "Use this template").
+
+2. Edit [slides.md](./slides.md) to build your talk. 
+    - Follow the excellent [marpit](https://marpit.marp.app/image-syntax) docs for inserting images and backgrounds and split screens etc. Put images in the [assets](./assets) folder.
+    - I recommend the [marp-vscode extension](https://marketplace.visualstudio.com/items?itemName=marp-team.marp-vscode) if you use Visual Studio Code.
+
+3. If you push to GitHub there is a [workflow](.github/workflows/marp.yml) to automatically build the talk with [marp-cli](https://github.com/marp-team/marp-cli) and publish the result to a `gh-pages` branch.
+    - Go to the repo settings and enable GitHub pages ([follow from step 5 of these instructions](https://docs.github.com/en/pages/getting-started-with-github-pages/creating-a-github-pages-site)), you should then see your slides at `https://yourusername.github.io/name-of-your-talk-repo`.
+
+ If you're not ready or don't want to publish your talk then don't do the final steps.
+
+## Further reading
+
+* [UCL branding instructions](https://www.ucl.ac.uk/staff/external-engagement/brand-and-visual-identity).
+* [UCL banner usage rules](https://www.ucl.ac.uk/brand/brand-essentials/ucl-banner).

slides.md

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+---
+marp: true
+theme: default
+style: |
+  .ccolumns {
+    display: grid;
+    grid-template-columns: 50% auto;
+    gap: 1rem;
+  }
+---
+
+![bg fit](assets/ucl-banner.png)
+
+<br/><br/><br/><!-- aesthetic vspace so the title isn't too close to the UCL banner -->
+
+# Title of the talk
+
+First Author¹, Second Author²
+
+¹Centre for Advanced Research Computing, UCL.
+¹Department of Collaborators, UCL.
+
+Conference, Location. 202Y-MM-DD.
+
+---
+
+<!--
+paginate: true
+footer: F. Author, 202Y-MM-DD.
+-->
+
+# A basic slide with bullets
+
+- First point.
+- Second point.
+
+---
+
+# Slide with bullets that appear
+
+* I appear...
+* Then I appear...
+* Then **I** appear 🎉!
+
+---
+
+# Centered on a slide
+
+<center>
+
+Example of something centred.
+
+</center> 
+
+---
+
+# Split bullet slide
+
+<br/>
+<div class="ccolumns">
+<div>
+
+- Bullet to the left
+
+</div>
+<div>
+
+- Bullet to the right
+
+</div>
+
+---
+
+# Code
+
+```py
+
+def i_prefer_python() -> None
+    print("Obiously I use type hints")
+    return
+
+```
+
+```c++
+
+int butWillWriteCppIfNeeded()
+{
+  return 1337;
+}
+
+```
+
+---
+
+# Emoji are cool
+
+- ❤️🎉✅
+
+---
+
+# Maths
+
+- An example of inline maths $e^{i\pi} = -1$
+- An example of display format maths:
+
+$$
+\widehat{f}(\xi) = \int_{-\infty}^{\infty} f(x)\ e^{-i 2\pi \xi x}\,dx.
+$$
+
+
+---
+
+# Conclusions
+
+- One or two clear takehome points.
+- Don't overload your audience.
+
+---
+
+# Appendix
+
+---
+
+# Add appendix slides if needed
+
+- Delete all of this if you don't need it.
+- (Obviously)