diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 9adc47d..f89c018 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,20 +1,28 @@
 ---
-image: s3lph/matemat-ci:20180619-01
+image: s3lph/matemat-ci:20180710-03
 
 stages:
 - test
 - codestyle
+- deploy
 
 test:
   stage: test
   script:
   - pip3 install -r requirements.txt
-  - python3-coverage run --branch -m unittest discover matemat
-  - python3-coverage report -m --include 'matemat/*' --omit '*/test_*.py'
+  - sudo -u matemat python3-coverage run --branch -m unittest discover matemat
+  - sudo -u matemat python3-coverage report -m --include 'matemat/*' --omit '*/test_*.py'
 
 codestyle:
   stage: codestyle
   script:
   - pip3 install -r requirements.txt
-  - pycodestyle matemat
-#  - mypy --ignore-missing-imports --strict -p matemat
+  - sudo -u matemat pycodestyle matemat
+#  - sudo -u matemat mypy --ignore-missing-imports --strict -p matemat
+
+docker_build_push:
+  stage: deploy
+  script:
+  - docker build -t "registry.gitlab.com/s3lph/matemat:$(git rev-parse HEAD)" .
+  - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_TOKEN registry.gitlab.com
+  - docker push "registry.gitlab.com/s3lph/matemat:$(git rev-parse HEAD)"
diff --git a/doc b/doc
index 51e9404..9634785 160000
--- a/doc
+++ b/doc
@@ -1 +1 @@
-Subproject commit 51e940460ddbaebb7f2ffc48d00d9ef19cf8d33f
+Subproject commit 9634785e5621b324f72598b3cee83bbc45c25d7b
diff --git a/testing/Dockerfile b/testing/Dockerfile
index 126a06f..5c0e1b3 100644
--- a/testing/Dockerfile
+++ b/testing/Dockerfile
@@ -3,8 +3,7 @@ FROM debian:buster
 
 RUN useradd -d /home/matemat -m matemat
 RUN apt-get update -qy
-RUN apt-get install -y --no-install-recommends python3-dev python3-pip python3-coverage python3-setuptools build-essential
+RUN apt-get install -y --no-install-recommends sudo git docker.io python3-dev python3-pip python3-coverage python3-setuptools build-essential
 RUN pip3 install wheel pycodestyle mypy
 
 WORKDIR /home/matemat
-USER matemat