Add Dockerfile from template found in pipeline configuration YAML file

Dockerfile

+FROM python:3.10-slim-bullseye
+
+# Uncomment the following command to install a Debian package
+# RUN apt-get update \
+#     && apt-get install -y xxx \
+#     && rm -rf /var/lib/apt/lists/*
+
+# Env variables that configure Python to run in a container:
+# do not keep dependencies downloaded by "pip install"
+ENV PIP_NO_CACHE_DIR=1
+# do not write "*.pyc" files
+ENV PYTHONDONTWRITEBYTECODE=1
+# do not buffer input/output operations, displaying prints and log messages immediately
+ENV PYTHONUNBUFFERED=1
+
+WORKDIR /app
+
+COPY requirements.txt .
+RUN pip install -r requirements.txt
+
+COPY . .