MacOS 12 installer workflow

.github/workflows/macos_12_dmg.yml

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+# This is a basic workflow to help you get started with Actions
+name: 'MacOS 12 - x64 DMG Build'
+
+# Controls when the action will run.
+on:
+  # Triggers the workflow on push or pull request events but only for the main branch
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+permissions:
+  contents: read
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        node-version: [20]
+
+    # The type of runner that the job will run on
+    runs-on: macos-12
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Cache node modules
+      uses: actions/cache@v4
+      env:
+        cache-name: cache-node-modules
+      with:
+        # npm cache files are stored in `~/.npm` on Linux/macOS
+        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-version }}
+      uses: actions/setup-node@v3
+      with:
+        node-version: ${{ matrix.node-version }}
+
+    - name: Install Dependencies
+      run: npm i && npm i -D cli-truncate iconv-corefoundation
+
+    - name: Check lint
+      run: npm run lint
+
+    - name: Build the app
+      run: npm run electron:build:dmg