test: env vars for docker

.gitea/workflows/docker.yaml

@@ -9,7 +9,10 @@ jobs:
       - name: Build and push
         uses: docker/build-push-action@v5
         env:
-          DOCKER_HOST: tcp://dind:2376
+          DOCKER_HOST: "tcp://docker:2376/"
+          DOCKER_TLS_CERTDIR: "/certs"
+          DOCKER_TLS_VERIFY: 1
+          DOCKER_CERT_PATH: "/certs/client"
         with:
           context: .
           file: ./Dockerfile