Added files to trigger the GitHub pages workflow (#213)

# Pull Request

## 📖 Description

<!--- Provide some background and a description of your work. -->
This change adds the docs folder files to the gitignore, except the README for ease of local development. It also adds a GitHub workflow to trigger against `main` branch merges (and manual triggers) that will release of the documentation site.

This should be merged after #212 

## ✅ Checklist

### General

<!--- Review the list and put an x in the boxes that apply. -->

- [ ] I have added tests for my changes.
- [x] I have tested my changes.
- [x] I have updated the project documentation to reflect my changes.

.github/workflows/cd-gh-pages.yml

@@ -0,0 +1,52 @@
+name: Deploy GitHub Pages
+
+on:
+  workflow_dispatch:
+  push:
+    branches: 
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node: [16.x]
+
+    steps:
+    - uses: actions/checkout@v2
+      with:
+          fetch-depth: 0
+
+    - name: Cache multiple paths
+      uses: actions/cache@v2
+      env:
+        cache-name: cache-node-modules
+      with:
+        path: ~/.npm
+        key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
+        restore-keys: |
+          ${{ runner.os }}-build-${{ env.cache-name }}-
+          ${{ runner.os }}-build-
+          ${{ runner.os }}-
+
+    - name: Use Node.js ${{ matrix.node }}
+      uses: actions/setup-node@v3
+      with:
+        node-version: ${{ matrix.node }}
+
+    - name: Install Dependencies
+      run: npm ci
+
+    - name: Build
+      run: npm run build --if-present
+
+    - name: Build GitHub Pages
+      run: npm run build:gh-pages -w website
+
+    - name: Deploy GitHub Pages
+      uses: JamesIves/github-pages-deploy-action@v4.3.0
+      with:
+        branch: gh-pages # The branch the action should deploy to.
+        folder: docs # The folder the action should deploy.
+

.gitignore

@@ -61,3 +61,9 @@ temp/
 # Ignore Build Artefacts
 bin/
 obj/
+
+# Ignore the docs folder
+docs/*
+
+# Except the docs folder README
+!docs/README.md

docs/README.md

@@ -0,0 +1,3 @@
+# Description
+
+This folder contains the statically generated documentation site, intended for use by GitHub pages. Aside from this README.md file, all files in this folder are automatically generated by files in the website/ folder.