Add GitHub workflow (#21)

.github/workflows/macos.yml

@@ -0,0 +1,33 @@
+name: CI - macOS
+
+# Controls when the workflow will run
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [macos-12]
+
+    steps:
+      - name: Check out repo
+        uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: |
+          brew analytics on
+          brew update
+          brew install -sq coreutils
+
+      - name: Run (dotfiles - test)
+        shell: bash
+        run: |
+          pwd && ls -la        

.github/workflows/stale.yml

@@ -7,7 +7,7 @@ name: Mark stale issues and pull requests
 
 on:
   schedule:
-  - cron: '44 12 * * *'
+  - cron: '19 8 * * *'
 
 jobs:
   stale:
@@ -18,9 +18,9 @@ jobs:
       pull-requests: write
 
     steps:
-    - uses: actions/stale@v5
+    - uses: actions/stale@v8
       with:
-        repo-token: ${{ secrets.REPO_STALE_TOKEN }}
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
         stale-issue-message: 'Stale issue message'
         stale-pr-message: 'Stale pull request message'
         stale-issue-label: 'no-issue-activity'

.github/workflows/ubuntu.yml

@@ -0,0 +1,29 @@
+name: CI - Ubuntu
+
+# Controls when the workflow will run
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Building on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-20.04, ubuntu-22.04]
+
+    steps:
+      - name: Check out repo
+        uses: actions/checkout@v4
+
+      - name: Run (dotfiles - test)
+        shell: bash
+        run: |
+          pwd && ls -la
+