GitHub CI Updates (#523)

* Create PULL_REQUEST_TEMPLATE.md

Add standard PR template, linking to this repo.

* Update ci.yml

Drop unsupported node 16 from CI build matrix.

* Update ci.yml

Add sensible timeouts

* Update ci.yml

Add concurrency (early exit) and permissions settings

* Update ci.yml

optimise "clean install" command, for speed and log  clarity.

* Update ci.yml

upgrade checkout action to v4

* Update ci.yml

allow repository owners to manually re-run CI

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,3 @@
+Fixes #
+
+I confirm I have read the [contributing guidelines](https://github.com/playcanvas/developer.playcanvas.com/blob/master/.github/CONTRIBUTING.md) and signed the [Contributor License Agreement](https://docs.google.com/a/playcanvas.com/forms/d/1Ih69zQfJG-QDLIEpHr6CsaAs6fPORNOVnMv5nuo0cjk/viewform).

.github/workflows/ci.yml

@@ -1,68 +1,90 @@
 name: CI
 
 on:
+  workflow_dispatch:
   push:
     branches: [ dev ]
   pull_request:
     branches: [ dev ]
 
+concurrency:
+  group: ci-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
 jobs:
   build:
     name: Build
     runs-on: ubuntu-latest
+    timeout-minutes: 10
 
     strategy:
       matrix:
-        node-version: [16.x, 18.x, 20.x]
+        node-version: [18.x, 20.x]
 
     steps:
     - name: Checkout repo
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
+
     - name: Use Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v3
       with:
         node-version: ${{ matrix.node-version }}
         cache: 'npm'
+
     - name: Install dependencies
-      run: npm ci
+      run: npm clean-install --progress=false --no-fund
+
     - name: Build Site
       run: npm run build
 
   lint:
     name: Lint
     runs-on: ubuntu-latest
+    timeout-minutes: 10
 
     strategy:
       matrix:
-        node-version: [16.x, 18.x, 20.x]
+        node-version: [18.x, 20.x]
 
     steps:
     - name: Checkout repo
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
+
     - name: Use Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v3
       with:
         node-version: ${{ matrix.node-version }}
         cache: 'npm'
+
     - name: Install dependencies
-      run: npm ci
+      run: npm clean-install --progress=false --no-fund
+
     - name: Lint JavaScript
       run: npm run lint
 
   lint-html:
     name: Lint HTML
     runs-on: ubuntu-latest
+    timeout-minutes: 10
+
     steps:
     - name: Checkout repo
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
+
     - name: Setup Node.js 18.x
       uses: actions/setup-node@v3
       with:
         node-version: 18.x
         cache: 'npm'
+
     - name: Install dependencies
-      run: npm ci
+      run: npm clean-install --progress=false --no-fund
+
     - name: Build
       run: npm run build
+
     - name: Lint HTML
       run: npm run lint:html