chore: add docker login step

Author: rjaegers

.github/workflows/continuous-integration.yml

@@ -83,6 +83,11 @@ jobs:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           persist-credentials: false
+      - uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ github.token }}
       - uses: devcontainers/action@1082abd5d2bf3a11abccba70eef98df068277772 # v1.4.3
         with:
           disable-repo-tagging: true