Fix some flaky tests (#1304)

* tests: Update used docker version

The `stable` version does not get updates anymore. The updated DIND
version is required for systems without `iptables` support.

* test: Add dotenv report artifacts to gitignore

Author: PigeonF

examples/docker-in-docker-build-with-local-registry/.gitlab-ci.yml

@@ -6,7 +6,7 @@ alpine-image:
       command:
         - --insecure-registry=gitlab-ci-local-registry:5000
   needs: []
-  image: docker:latest
+  image: docker:cli
   stage: build
   script:
     - docker pull $CI_REGISTRY_IMAGE:latest || true

examples/docker-in-docker-build/.gitlab-ci.yml

@@ -4,7 +4,7 @@ alpine-image:
   services:
     - docker:dind
   needs: []
-  image: docker:stable
+  image: docker:cli
   stage: build
   script:
     - printenv

examples/docker-swarm-php/.gitlab-ci.yml

@@ -17,7 +17,7 @@ composer-install:
 # @Description Build/Push PHP image
 build-php:
   needs: [composer-install]
-  image: docker:stable
+  image: docker:cli
   stage: build
   artifacts:
     reports:

tests/test-cases/artifacts-reports-dotenv/.gitignore

@@ -1 +1,2 @@
 /build.env
+multi*.env

tests/test-cases/dind-no-tls/.gitlab-ci.yml

@@ -1,8 +1,9 @@
 ---
 test-job:
-  image: docker.io/library/docker:stable
+  image: docker.io/library/docker:cli
   services:
-    - name: docker.io/library/docker:stable-dind
+    # Pinned to 27-dind in case non-TLS DIND is removed at some point in the future.
+    - name: docker.io/library/docker:27-dind
       alias: docker
   variables:
     DOCKER_HOST: tcp://docker:2375

tests/test-cases/dind-no-tls/integration.dind-no-tls.test.ts

@@ -25,7 +25,7 @@ test("dind-no-tls <test-job> --needs", async () => {
     expect(writeStreams.stdoutLines).toEqual(expect.arrayContaining(expectedStdout));
 
     const expectedStderr = [
-        chalk`{blueBright test-job} {redBright >} WARNING: API is accessible on http://0.0.0.0:2375 without encryption.`,
+        chalk`{blueBright test-job} {redBright >} [DEPRECATION NOTICE]: API is accessible on http://0.0.0.0:2375 without encryption.`,
     ];
     expect(writeStreams.stderrLines).toEqual(expect.arrayContaining(expectedStderr));
 });

tests/test-cases/dind-tls/.gitlab-ci.yml

@@ -4,7 +4,7 @@ test-job:
     - name: docker.io/library/docker:dind
       alias: docker
   needs: []
-  image: docker.io/library/docker:stable
+  image: docker.io/library/docker:cli
   stage: build
   script:
     - docker pull -q alpine 1> /dev/null