Feat: validate domains are alive (and w/ CI)

.github/workflows/main.yml

@@ -16,16 +16,13 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - uses: actions/checkout@v4
         with:
           persist-credentials: false
       - uses: pnpm/action-setup@v4
-        name: Install pnpm
         with:
           run_install: false
-      - name: Use Node.js
-        uses: actions/setup-node@v4
+      - uses: actions/setup-node@v4
         with:
           node-version-file: ".node-version"
           cache: "pnpm"
@@ -54,8 +51,7 @@ jobs:
             ${{ runner.os }}-v3-${{ steps.date.outputs.year }}-${{ steps.date.outputs.month }}-
             ${{ runner.os }}-v3-${{ steps.date.outputs.year }}-
             ${{ runner.os }}-v3-
-      - name: Install dependencies
-        run: pnpm install
+      - run: pnpm install
       - run: pnpm run build
       - name: Pre-deploy check
         # If the public directory doesn't exist, the build should fail.