Use poetry instead of pip

.devcontainer/Dockerfile

@@ -1,21 +1,44 @@
 FROM python:3.11-slim AS base
 LABEL maintainer="emilcode-dev"
 
+# Poetry environment
+# https://python-poetry.org/docs/configuration/#using-environment-variables
+ENV POETRY_VERSION=2.2.1 \
+    POETRY_HOME="/opt/poetry" \
+    # do not ask any interactive question
+    POETRY_NO_INTERACTION=1 \
+    POETRY_VIRTUALENVS_CREATE=false
+
+ENV PATH="$POETRY_HOME/bin:$PATH"
+
 # Additional dev tooling (e.g. Git, etc.)
 RUN apt-get update && apt-get install -y --no-install-recommends \
-        git \
-        tree \
+        curl \
         ffmpeg \
         && rm -rf /var/lib/apt/lists/*
 
+# install poetry - respects $POETRY_VERSION & $POETRY_HOME
+RUN curl -sSL https://install.python-poetry.org | python3 -
+
 # Set working directory
 WORKDIR /workspace
 
-# Install Python dependencies
-RUN pip install --upgrade pip
+# Copy only dependency-related files first (for better build caching)
+COPY ./poetry.lock ./pyproject.toml ./
+
+# Install only runtime dependencies (without dev dependencies)
+RUN poetry install --only main --no-root
+
+
+# ---- Development image ----
+FROM base AS dev
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+        git \
+        tree
 
-# Install requirements
-COPY requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
+# Install all dependencies (including dev/test/docs)
+RUN poetry install --no-root
 
-# CMD ["python", "main.py"]
+# Default entrypoint — start bash
+ENTRYPOINT ["/bin/bash"]

.devcontainer/devcontainer.json

@@ -2,13 +2,14 @@
     "name": "nightingale",
     "build": {
         "dockerfile": "Dockerfile",
-        "context": ".."
+        "context": "..",
+        "target": "dev"
     },
     "customizations": {
         "vscode": {
             "extensions": [
                 "ms-python.python",
-                "ms-toolsai.jupyter",
+                "ms-toolsai.jupyter@2025.7.0",
                 "ms-toolsai.jupyter-keymap",
                 "ms-toolsai.jupyter-renderers",
                 "ms-toolsai.datawrangler",
@@ -23,6 +24,6 @@
                 }
         }
     },
-    "postCreateCommand": "echo 'nightingale dev container is ready!'"
+    "postCreateCommand": "poetry install && echo 'nightingale dev container is ready!'"
 }