build(cert): ensure OpenCV runtime libs and uv-managed venv in backend image

Author: soohyunme

cert/backend/Dockerfile

@@ -1,25 +1,31 @@
 # Use an official Python runtime as a parent image
 FROM python:3.11-slim
 
+# 기본 Python 런타임 환경 변수
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    TZ=Asia/Seoul \
+    VIRTUAL_ENV=/app/.venv \
+    PATH="/app/.venv/bin:${PATH}"
+
 # Set the working directory in the container
 WORKDIR /app
 
 # Install tzdata and set timezone to Asia/Seoul
 RUN apt-get update && \
-    apt-get install -y --no-install-recommends tzdata && \
+    apt-get install -y --no-install-recommends tzdata libgl1 libglib2.0-0 && \
     ln -snf /usr/share/zoneinfo/Asia/Seoul /etc/localtime && \
     echo "Asia/Seoul" > /etc/timezone && \
     apt-get clean && rm -rf /var/lib/apt/lists/*
 
-ENV TZ=Asia/Seoul
+# install uv for improved package management
+RUN pip install --no-cache-dir "uv>=0.5.0"
 
-# Copy the dependency files
-COPY requirements.txt .
-COPY uv.lock .
+# Copy only the dependency files to leverage Docker cache
+COPY pyproject.toml uv.lock ./
 
-# Install any needed packages specified in requirements.txt
-# Using uv pip install for faster and more reliable dependency management
-RUN pip install uv && uv pip install --system -r requirements.txt
+# Install the dependencies into the project virtualenv
+RUN uv sync --frozen
 
 # Copy the rest of the application code
 COPY . .

cert/backend/pyproject.toml

@@ -6,10 +6,11 @@ readme = "README.md"
 requires-python = ">=3.11"
 dependencies = [
     "aiohttp>=3.12.15",
-    "dotenv>=0.9.9",
+    "aiosmtplib>=4.0.1",
     "fastapi>=0.109.1",
+    "gunicorn>=21.2.0",
     "invisible-watermark>=0.2.0",
-    "opencv-python>=4.11.0.86",
+    "opencv-python-headless>=4.11.0.86",
     "pillow>=10.1.0",
     "pydantic>=2.5.3",
     "pydantic-settings>=2.1.0",
@@ -23,5 +24,4 @@ dependencies = [
 
 [dependency-groups]
 dev = [
-    "aiosmtplib>=4.0.1",
 ]