add Docker container

.dockerignore

+docs
+tests
+.editorconfig
+.gitignore
+.travis.yml
\ No newline at end of file

Dockerfile

+FROM python:3.10.0 as python-base
+
+LABEL maintainer="Matteo Spanio" version="0.1.0"
+
+# https://python-poetry.org/docs#ci-recommendations
+ENV POETRY_VERSION=1.3.1
+ENV POETRY_HOME=/opt/poetry
+ENV POETRY_VENV=/opt/poetry-venv
+
+# Tell Poetry where to place its cache and virtual environment
+ENV POETRY_CACHE_DIR=/opt/.cache
+
+# Create stage for Poetry installation
+FROM python-base as poetry-base
+
+# Creating a virtual environment just for poetry and install it with pip
+RUN python3 -m venv $POETRY_VENV \
+    && $POETRY_VENV/bin/pip install -U pip setuptools \
+    && $POETRY_VENV/bin/pip install poetry==${POETRY_VERSION}
+
+# Create a new stage from the base python image
+FROM python-base as example-app
+
+# Copy Poetry to app image
+COPY --from=poetry-base ${POETRY_VENV} ${POETRY_VENV}
+
+# Add Poetry to PATH
+ENV PATH="${PATH}:${POETRY_VENV}/bin"
+
+WORKDIR /app
+
+COPY . ./
+
+RUN poetry install --no-cache --only main