[ci] #388: Add image generation build automation

Introduce Dockerfile based on latest Python available
Install silkaj via pip and make it available to the CLI
Two steps: build, copy

Manual triggered job to generate the image
Definition as an extensible job for future usages
Rename stage

.gitlab-ci.yml

 stages:
   - checks
   - tests
-  - publish
+  - package
   - coverage
 
 variables:
@@ -76,8 +76,30 @@ tests-3.9:
   variables:
     PYTHON_VERSION: "3.9"
 
+.container:
+  stage: package
+  tags: [docker]
+  image: docker:latest
+  services:
+  - docker:dind
+  script:
+    - docker pull $CI_REGISTRY_IMAGE:$IMAGE_TAG || true
+    - docker build --cache-from $CI_REGISTRY_IMAGE:$IMAGE_TAG --pull -t "$CI_REGISTRY_IMAGE:$IMAGE_TAG" -f release/container-pip .
+    - docker login -u "$CI_REGISTRY_USER" -p "$CI_BUILD_TOKEN" $CI_REGISTRY
+    - docker tag "$CI_REGISTRY_IMAGE:$IMAGE_TAG" "$CI_REGISTRY_IMAGE:$IMAGE_TAG"
+    - docker push "$CI_REGISTRY_IMAGE:$IMAGE_TAG"
+    - docker tag "$CI_REGISTRY_IMAGE:$IMAGE_TAG" "$CI_REGISTRY_IMAGE:latest"
+    - docker push "$CI_REGISTRY_IMAGE:latest"
+
+container:
+  extends: .container
+  variables:
+    IMAGE_TAG: "dev"
+  rules:
+    - when: manual
+
 pypi_test:
-  stage: publish
+  stage: package
   rules:
     - if: $CI_COMMIT_TAG
       when: manual
@@ -86,7 +108,7 @@ pypi_test:
     - poetry publish --build --username $PYPI_TEST_LOGIN --password $PYPI_TEST_PASSWORD --repository pypi_test
 
 pypi:
-  stage: publish
+  stage: package
   rules:
     - if: $CI_COMMIT_TAG
       when: manual

release/container-pip

+# ------------------------------------------------------------------------------
+# Build Stage
+# ------------------------------------------------------------------------------
+ARG PYTHON_VERS=3.9
+FROM registry.duniter.org/docker/python3/poetry/${PYTHON_VERS}:latest as build
+
+WORKDIR /silkaj
+
+# Copy source tree
+COPY ./ ./
+
+# Install Silkaj
+RUN pip install .
+
+# ------------------------------------------------------------------------------
+# Final Stage
+# ------------------------------------------------------------------------------
+FROM registry.duniter.org/docker/python3/poetry/${PYTHON_VERS}:latest
+ARG PYTHON_VERS=3.9
+
+# Create silkaj group and user
+RUN groupadd -g 1111 silkaj && \
+    useradd -d /silkaj -g silkaj -u 1111 silkaj
+
+# Copy the build artifact from the build stage
+COPY --from=build /usr/local/bin/silkaj /usr/local/bin/silkaj
+COPY --from=build /usr/local/lib/python${PYTHON_VERS}/site-packages/ /usr/local/lib/python${PYTHON_VERS}/site-packages/
+
+# Use silkaj user
+USER silkaj
+WORKDIR /usr/local/lib/python${PYTHON_VERS}/site-packages/silkaj
+
+CMD ["/usr/local/bin/silkaj"]