Update the CI/CD configuration to one step.

.drone.yml

@@ -3,11 +3,9 @@ type: docker
 name: default
 
 steps:
-- name: installing deps and test
+- name: install dependencies and run tests
   image: python:3.10-alpine
   commands:
-  - export POETRY_HOME=/opt/poetry
-  - python3 -m venv $POETRY_HOME
-  - $POETRY_HOME/bin/pip install poetry==1.3.2
-  - $POETRY_HOME/bin/poetry install
-  - $POETRY_HOME/bin/poetry run pytest -s
+  - pip install -r requirements.txt
+  - pytest -s
+