ci: upgrade docker lib to 7.1.0

Upgrade docker lib to work around the below regression in requests.

```
Not supported URL scheme http+docker
```

Issue: docker/docker-py#3256

Fix: docker/docker-py#3257

Signed-off-by: Chase Qi <[email protected]>

Author: chase-qi

.gitignore

@@ -1 +1,2 @@
 *.swp
+cache

.gitlab-ci.yml

@@ -22,15 +22,17 @@ codestyle:
 # Run the tests #
 #################
 .lavafed: &lavafed
-  only: [schedules]
+  # only: [schedules]
   stage: lavafed
   image: docker:dind
   variables:
     DOCKER_DRIVER: overlay2
     DOCKER_HOST: "unix:///var/run/docker.sock"
   before_script:
   - apk add gcc git python3-dev
-  - apk add docker-py py3-beautifulsoup4 py3-lxml py3-netifaces py3-pyaml
+  - apk add docker-py py3-beautifulsoup4 py3-lxml py3-netifaces py3-pyaml py3-pip
+  # Workaround for https://github.com/docker/docker-py/issues/3256
+  - python3 -m pip install --upgrade --break-system-packages docker==7.1.0
   script:
   - 'dockerd -l fatal &'
   - 'while [ -z "$(docker ps 2>/dev/null)" ]; do echo "waiting"; sleep 1; done'