Switch to python alpine containers

Switched to basic python containers running on alpine, onto which the ci
steps simply install poetry.

Switching to nox for test automation across multiple python versions.

.woodpecker.yml

@@ -1,34 +1,42 @@
 # branches: main
 
 pipeline:
-  unit_tests:
-    image: mquade/poetry:3.9-1.1.11
-    commands:
-      - poetry config virtualenvs.create false
-      - poetry install
-      - pytest
-
   code_lint:
-    image: mquade/poetry:3.9-1.1.11
+    image: python:alpine
     commands:
-      - poetry config virtualenvs.create false
+      - curl -sSL https://install.python-poetry.org | python3 -
       - poetry install
       - pip install black
+      - echo "----------------- running lint ------------------"
+      - python --version && poetry --version && black --version
       - black .
 
-  static_analysis:
-    image: mquade/poetry:3.9-1.1.11
+  unit_tests:
+    image: thekevjames/nox
     commands:
-      - poetry config virtualenvs.create false
+      - curl -sSL https://install.python-poetry.org | python3 -
+      - poetry install
+      - echo "----------------- running tests ------------------"
+      - python --version && poetry --version && nox --version
+      - nox
+
+  static_analysis:
+    image: python:alpine
+    commands:
+      - curl -sSL https://install.python-poetry.org | python3 -
       - poetry install
       - pip install mypy
+      - echo "----------------- running analysis ------------------"
+      - python --version && poetry --version && mypy --version
       - mypy .
 
   build_dist:
-    image: mquade/poetry:3.9-1.1.11
+    image: python:alpine
     commands:
-      - poetry config virtualenvs.create false
+      - curl -sSL https://install.python-poetry.org | python3 -
       - poetry install
+      - echo "----------------- running analysis ------------------"
+      - python --version && poetry --version
       - poetry build
     when:
       branch: main