[enh] add .gitlab-ci.yml

.gitlab-ci.yml

+stages:
+  - checks
+  - tests
+  - release
+
+variables:
+  DOCKER_IMAGE: "registry.duniter.org/docker/python3/tikka-builder"
+  BUILD_OS: "ubuntu-18.04"
+  TIKKA_VERSION: "0.1.0"
+
+image: $DOCKER_IMAGE/$BUILD_OS
+
+.code_changes:
+  rules:
+    - changes:
+      - tikka/**/*.py
+      - tests/**/*.py
+
+.changes:
+  rules:
+    - changes:
+      - tikka/**/*.py
+      - tests/**/*.py
+      - .gitlab-ci.yml
+      - Makefile
+      - pyproject.toml
+
+build:
+  extends: .changes
+  stage: checks
+  script:
+    - poetry build
+
+checks:
+  extends:
+#    - .code_changes
+  stage: checks
+  script:
+    - poetry install --no-root
+    - make format
+    - make mypy
+    - make pylint
+    - make isort
+    - make insert-license
+
+tests:
+  extends: .changes
+  stage: tests
+  script:
+    - poetry install --no-root
+    - bin/tests.sh domains
+
+pypi:
+  stage: release
+  script:
+    - poetry publish --build --username $PYPI_LOGIN --password $PYPI_PASSWORD
+  rules:
+    - if: $CI_COMMIT_TAG
+      when: manual
+    - if: $CI_COMMIT_BRANCH == "main"
+      when: manual
+    - when: never
+
+pypi_test:
+  stage: release
+  script:
+    - poetry config repositories.pypi_test https://test.pypi.org/legacy/
+    - poetry publish --build --username $PYPI_TEST_LOGIN --password $PYPI_TEST_PASSWORD --repository pypi_test
+  rules:
+    - if: $CI_COMMIT_TAG
+      when: manual
+    - if: $CI_COMMIT_BRANCH == "main"
+      when: manual
+    - when: never
+
+ubuntu-18.04:
+  stage: release
+  image: "registry.duniter.org/docker/python3/tikka-builder/ubuntu-18.04"
+  script:
+    - poetry install --no-root
+    - make i18n_build
+    - make pyinstaller
+#  artifacts:
+#    paths:
+#      - dist/tikka.zip
+#    expire_in: 1 yrs
+  rules:
+#    - if: $CI_COMMIT_TAG
+#      when: manual
+#    - if: $CI_COMMIT_BRANCH == "main"
+#      when: manual
+    - when: manual