Merge pull request #227 from MickaelFontes/update-dockerfile

build: update Dockerfile

Dockerfile.dev

@@ -1,33 +1,47 @@
-# The builder image, used to build the virtual environment
-FROM python:3.10 as builder
-
-RUN pip install poetry
-
-ENV POETRY_NO_INTERACTION=1 \
-    POETRY_VIRTUALENVS_IN_PROJECT=1 \
-    POETRY_VIRTUALENVS_CREATE=1 \
-    POETRY_CACHE_DIR=/tmp/poetry_cache
-
-WORKDIR /app
-
-COPY pyproject.toml poetry.lock ./
-RUN touch README.md
-
-RUN poetry install --without dev --no-root && rm -rf $POETRY_CACHE_DIR
-
-# The runtime image, used to just run the code provided its virtual environment
-FROM python:3.10 as runtime
-
-ENV VIRTUAL_ENV=/app/.venv \
-    PATH="/app/.venv/bin:$PATH" \
-    HOST=0.0.0.0 \
-    DASH_DEBUG_MODE=True
-COPY --from=builder ${VIRTUAL_ENV} ${VIRTUAL_ENV}
-
-COPY assets/ ./assets
-COPY data/ ./data
-COPY app.py ./
-COPY pages/ ./pages
-
-EXPOSE 8080
-CMD ["gunicorn", "-b", ":8080", "-w", "2", "app:server"]
+FROM python:3.10-slim AS builder
+
+# --- Install Poetry ---
+ARG POETRY_VERSION=2.0
+
+ENV POETRY_HOME=/opt/poetry
+ENV POETRY_NO_INTERACTION=1
+ENV POETRY_VIRTUALENVS_IN_PROJECT=1
+ENV POETRY_VIRTUALENVS_CREATE=1
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+# Tell Poetry where to place its cache and virtual environment
+ENV POETRY_CACHE_DIR=/opt/.cache
+
+RUN pip install "poetry==${POETRY_VERSION}"
+
+WORKDIR /app
+
+# --- Reproduce the environment ---
+# You can comment the following two lines if you prefer to manually install
+#   the dependencies from inside the container.
+COPY pyproject.toml poetry.lock /app/
+
+# Install the dependencies and clear the cache afterwards.
+#   This may save some MBs.
+RUN poetry install --without dev --no-root && rm -rf $POETRY_CACHE_DIR
+
+# Now let's build the runtime image from the builder.
+#   We'll just copy the env and the PATH reference.
+FROM python:3.10-slim AS runtime
+
+ENV VIRTUAL_ENV=/app/.venv
+ENV PATH="/app/.venv/bin:$PATH"
+ENV HOST=0.0.0.0
+
+COPY --from=builder ${VIRTUAL_ENV} ${VIRTUAL_ENV}
+
+WORKDIR /app
+
+COPY assets/ ./assets
+COPY data/ ./data
+COPY app.py ./
+COPY pages/ ./pages
+
+EXPOSE 8080
+HEALTHCHECK CMD python -c "import requests; import sys; sys.exit(0) if requests.get('http://127.0.0.1:8080/').status_code == 200 else sys.exit(1);"
+ENTRYPOINT ["gunicorn", "-b", ":8080", "-w", "2", "app:server"]

app.py

@@ -1,4 +1,5 @@
 """Application file for noplp-stats"""
+import os
 
 import dash
 import dash_bootstrap_components as dbc
@@ -14,7 +15,8 @@
 )
 server = app.server
 app.title = "NOPLP stats - Statistiques sur N'oubliez pas les paroles"
-
+# To still have debug control, behind gunicorn, using DASH_DEBUG environment variable.
+app.enable_dev_tools(debug=bool(os.getenv("DASH_DEBUG", None)))
 
 app.layout = html.Div(
     [