ci: execute CI pipeline inside of special Docker container supporting e2e testing

#3

.github/workflows/ci.yml

@@ -10,16 +10,14 @@ on:
 jobs:
   Build:
     runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/${{ github.repository }}/ci-runner:node-22-trixie-slim
     steps:
       - uses: actions/checkout@v5
         with:
           fetch-depth: 1
       - name: Install pnpm
         uses: pnpm/action-setup@v4
-      - uses: actions/setup-node@v5
-        with:
-          node-version: '22'
-          package-manager-cache: false
       - name: Environment details
         run: pnpm version
       - name: Install dependencies