Add CI config.

.gitlab-ci.yml

+image: python:3.8-buster
+
+build:
+  stage: build
+  before_script:
+  - apt-get -y update && apt-get -y install make pelican
+  script:
+  - make publish
+  artifacts:
+    paths:
+      - output/
+
+deploy_naturalnet:
+  stage: deploy
+  only:
+  - master
+  before_script:
+  - apt-get -y update && apt-get -y install rsync openssh-client
+  - eval $(ssh-agent -s)
+  - echo "$SSH_PRIVATE_KEY" | tr -d '\r' | ssh-add - >/dev/null
+  - mkdir -p ~/.ssh
+  - chmod 700 ~/.ssh
+  - echo "$SSH_KNOWN_HOSTS" >~/.ssh/known_hosts
+  - chmod 644 ~/.ssh/known_hosts
+  script:
+  - rsync -avzh --delete output/* $SSH_USERNAME@$SSH_HOST:/srv/www/dominik-george.de/www.dominik-george.de/