Refactor Dockerfile for multi-stage build and add .dockerignore

.dockerignore

@@ -0,0 +1,41 @@
+# Git
+.git
+.gitignore
+
+# Python
+__pycache__
+*.pyc
+*.pyo
+*.pyd
+.Python
+env
+pip-log.txt
+pip-delete-this-directory.txt
+.tox
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.log
+
+# Virtual environment
+venv
+.env
+.venv
+ENV
+
+# IDE
+.idea
+.vscode
+*.swp
+*.swo
+
+# Project specific
+docs/
+tests/
+*.md
+LICENSE
+pytest.ini
+setup.py

Dockerfile

@@ -1,14 +1,37 @@
-FROM python:3.12
+# Build stage
+FROM python:3.12-slim AS builder
+
+WORKDIR /build
+
+# Copy requirements first to leverage Docker cache
+COPY requirements.txt .
+
+# Install build dependencies and Python packages
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends gcc python3-dev \
+    && pip install --no-cache-dir --upgrade pip \
+    && pip install --no-cache-dir --timeout 1000 -r requirements.txt \
+    && rm -rf /var/lib/apt/lists/*
+
+# Runtime stage
+FROM python:3.12-slim
+
+# Set Python environment variables
+ENV PYTHONUNBUFFERED=1
+ENV PYTHONDONTWRITEBYTECODE=1
+
+# Install git
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends git \
+    && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app
 
 # Create a non-root user
 RUN useradd -m -u 1000 appuser
 
+COPY --from=builder /usr/local/lib/python3.12/site-packages/ /usr/local/lib/python3.12/site-packages/
 COPY src/ ./
-COPY requirements.txt ./
-
-RUN pip install -r requirements.txt
 
 # Change ownership of the application files
 RUN chown -R appuser:appuser /app
@@ -18,4 +41,4 @@ USER appuser
 
 EXPOSE 8000
 
-CMD ["uvicorn", "main:app", "--reload", "--host", "0.0.0.0"]
+CMD ["python", "-m", "uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]