working version

backend/Dockerfile.dev

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+FROM python:3.11-slim
+
+LABEL maintainer="LeDiscord Team"
+LABEL version="1.0"
+LABEL description="LeDiscord Backend - Environnement Développement"
+
+WORKDIR /app
+
+# Env dev
+ENV ENVIRONMENT=development \
+    PYTHONPATH=/app \
+    PYTHONUNBUFFERED=1 \
+    PYTHONDONTWRITEBYTECODE=1
+
+# Dépendances système (minifiées)
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    gcc \
+    libpq-dev \
+    libmagic1 \
+    libgl1 \
+    libglib2.0-0 \
+    libsm6 \
+    libxext6 \
+    libxrender1 \
+    libgomp1 \
+    curl \
+  && rm -rf /var/lib/apt/lists/*
+
+# Requirements (cache friendly)
+COPY requirements.txt .
+
+# Uvicorn[standard] apporte watchfiles pour un --reload rapide/stable en dev
+RUN pip install --no-cache-dir --upgrade pip \
+ && pip install --no-cache-dir -r requirements.txt \
+ && pip install --no-cache-dir "uvicorn[standard]"
+
+# Dossiers utiles
+RUN mkdir -p /app/uploads /app/logs
+
+# Code source
+COPY . .
+
+# Env dev
+COPY .env.development .env
+
+# Permissions
+RUN chmod -R 755 /app
+
+EXPOSE 8000
+
+# Hot-reload + respect des en-têtes proxy (utile si tu testes derrière Traefik en dev)
+# Astuce: on exclut uploads/logs du reload pour éviter les restarts inutiles
+CMD ["uvicorn", "app:app", \
+     "--reload", \
+     "--reload-exclude", "uploads/*", \
+     "--reload-exclude", "logs/*", \
+     "--host", "0.0.0.0", \
+     "--port", "8000", \
+     "--log-level", "debug", \
+     "--proxy-headers", \
+     "--forwarded-allow-ips=*"]