chore: update Dockerfile

- Improves layering to leverage.docker caching
- Bumps poetry version to the latest stable

Author: wax911

Dockerfile

@@ -1,6 +1,5 @@
 FROM python:3.13.2-slim AS base
 WORKDIR /usr/src
-COPY . /usr/src/
 
 FROM base AS scaffold
 RUN apt-get update \
@@ -11,11 +10,14 @@ RUN apt-get update \
     && pip install --upgrade pip
 
 FROM scaffold AS dependencies
-RUN pip install poetry==1.5.0 \
+COPY pyproject.toml poetry.lock ./
+RUN pip install poetry==2.0.1 \
     && poetry config virtualenvs.create false \
-    && poetry install --no-interaction --no-ansi
+    && poetry install --no-root --no-interaction --no-ansi
 
 FROM dependencies AS final
-ENV PYTHONDONTWRITEBYTECODE 1
-ENV PYTHONUNBUFFERED 1
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+
+COPY . /usr/src/
 RUN chmod +x start.sh