build: add Dockerfile and devcontainer

.devcontainer/Dockerfile

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+FROM mcr.microsoft.com/devcontainers/python:1-3.11-bookworm AS d3lta-prod
+
+ENV PIP_DISABLE_PIP_VERSION_CHECK=on \
+    PIP_DEFAULT_TIMEOUT=100 \
+    \
+    # Poetry
+    # https://python-poetry.org/docs/configuration/#using-environment-variables
+    POETRY_VERSION=2.1.1 \
+    # make poetry install to this location
+    POETRY_HOME="/opt/poetry" \
+    # do not ask any interactive questions
+    POETRY_NO_INTERACTION=1 \
+    # never create virtual environments automatically
+    POETRY_VIRTUALENVS_CREATE=false
+
+RUN pip install --no-cache-dir --upgrade pip
+RUN pipx install poetry==${POETRY_VERSION}
+
+WORKDIR /app
+COPY pyproject.toml poetry.lock setup.py README.md ./
+# pre-install dependencies
+RUN --mount=type=cache,target=/root/.cache poetry install --no-root 
+
+COPY notebooks /app/notebooks/
+COPY d3lta /app/d3lta/
+RUN --mount=type=cache,target=/root/.cache poetry install
+
+FROM d3lta-prod AS d3lta-dev
+
+RUN --mount=type=cache,target=/root/.cache poetry install --with dev

.devcontainer/devcontainer.json

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+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/python
+{
+	"name": "Python 3",
+	"dockerFile": "./Dockerfile",
+	"context": "..",
+	// Features to add to the dev container. More info: https://containers.dev/features.
+	// "features": {}
+}