Update Dockerfile to configure Poetry virtual environments in-project

Dockerfile

@@ -27,10 +27,9 @@ COPY --chown=user pyproject.toml poetry.lock ./
 
 # Disable virtual environments creation by Poetry
 # as the Docker container itself is an isolated environment
-RUN poetry config virtualenvs.create false
+RUN poetry config virtualenvs.in-project true
 
 #  Install dependencies
-# RUN pip3 install -r requirements.txt
 RUN poetry install
 
 # Copy the current directory contents into the container