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Merged
danielcuthbert merged 3 commits into from
Nov 25, 2025
Merged

Optimize Docker build with layer caching and .dockerignore #83

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Initial plan
Copilot Nov 25, 2025
1920c9f
Optimize Docker build: use multi-stage, better layer caching, add .do…
Copilot Nov 25, 2025
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Address code review: remove Docker files from .dockerignore, add prod…
Copilot Nov 25, 2025
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62 changes: 62 additions & 0 deletions .dockerignore
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# Git
.git
.gitignore
.github

# Documentation
README.md
CONTRIBUTING.md
SECURITY.md
LICENSE
screenshots/

# Build and environment
*.log
*.pyc
__pycache__/
*.py[cod]
*$py.class
.Python
build/
dist/
*.egg-info/
.eggs/
*.egg

# Virtual environments
.env
.venv
env/
venv/
ENV/

# IDE and editor files
.vscode/
.idea/
*.swp
*.swo
.DS_Store

# Testing and coverage
.tox/
.coverage
.coverage.*
.cache/
.pytest_cache/
htmlcov/
coverage.xml
nosetests.xml

# Terraform (infrastructure code not needed in app container)
terraform/

# Database (will be created at runtime)
db.sqlite3
*.sqlite3

# BOM files (not needed for runtime)
bom.json
bom.vex.json

# Storage JSON files (generated at runtime)
storage/*.json
41 changes: 22 additions & 19 deletions Dockerfile
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FROM alpine:latest
ENV VIRTUAL_ENV=/opt/venv
ENV PATH="$VIRTUAL_ENV/bin:$PATH"
FROM python:3.11-slim

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

RUN apk add --no-cache python3 && \
python3 -m venv $VIRTUAL_ENV && \
python3 -m ensurepip && \
pip3 install --upgrade pip setuptools && \
if [ ! -e /usr/bin/pip ]; then ln -s pip3 /usr/bin/pip ; fi && \
if [[ ! -e /usr/bin/python ]]; then ln -sf /usr/bin/python3 /usr/bin/python; fi

COPY . /app
WORKDIR /app

# install psycopg2 dependencies
RUN apk update \
&& apk add postgresql-dev gcc python3-dev musl-dev postgresql-libs zlib-dev jpeg-dev harfbuzz-dev postgresql zlib jpeg
# Install system dependencies in a single layer
RUN apt-get update \
&& apt-get install -y --no-install-recommends \
libpq5 \
&& rm -rf /var/lib/apt/lists/*

# Copy only requirements first for better layer caching
COPY requirements.txt .

# Install Python dependencies
RUN pip install --no-cache-dir -r requirements.txt

# Copy application code
COPY . .

RUN pip install psycopg2 Pillow
RUN pip3 install -r requirements.txt
RUN python manage.py makemigrations
RUN python manage.py migrate
CMD ["python", "manage.py", "runserver", "0.0.0.0:8000"]
# Run migrations at container startup, not build time
# Note: For production with multiple replicas, use a separate migration job
CMD ["sh", "-c", "python manage.py migrate && python manage.py runserver 0.0.0.0:8000"]
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