ci: smaller docker image

Dockerfile

@@ -1,10 +1,30 @@
-FROM python:3.11-slim
+FROM python:3.11.11-alpine3.20 AS builder
+
+ARG POETRY_VERSION=1.8.5
+ENV POETRY_HOME=/opt/poetry
+ENV POETRY_NO_INTERACTION=1
+ENV POETRY_VIRTUALENVS_IN_PROJECT=1
+ENV POETRY_VIRTUALENVS_CREATE=1
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+ENV POETRY_CACHE_DIR=/opt/.cache
+
+RUN pip install "poetry==${POETRY_VERSION}"
 
 WORKDIR /app
 
-COPY . /app/
+COPY pyproject.toml poetry.lock /app/
 
-RUN pip install --no-cache-dir poetry==1.8.5 && \
-    poetry install --no-interaction --no-dev
+RUN poetry install --only main --no-root && rm -rf $POETRY_CACHE_DIR
 
-CMD ["sh", "-c", "poetry run ppgee $USERNAME $PASSWORD"]
+COPY ppgee /app/ppgee
+
+RUN poetry install --without dev
+
+FROM python:3.11.11-alpine3.20 AS runtime
+
+ENV PATH="/app/.venv/bin:$PATH"
+
+COPY --from=builder /app /app
+
+ENTRYPOINT [ "ppgee" ]