Add Docker deployment configuration

- Add Dockerfile for production (multi-stage build)
- Add Dockerfile.dev for development with hot reload
- Add docker-compose.yml with 5 services (web, mariadb, redis, celery-worker, celery-beat)
- Add docker-compose.dev.yml for development overrides
- Add .dockerignore for optimized builds
- Add docker/entrypoint.sh startup script
- Add .env.docker.example template
- Add Makefile for common commands
- Add deploy.sh for one-command deployment
- Update config/settings/selfhosted.py to support MariaDB via DATABASE_URL
- Add mysqlclient to requirements.txt for MariaDB support
- Update .gitignore to exclude .env.docker

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Makefile

@@ -0,0 +1,111 @@
+.PHONY: help dev dev-build prod build deploy logs logs-web logs-celery shell migrate makemigrations createsuperuser test clean stop restart status backup
+
+# Default target
+help:
+	@echo "KeepItGoing Server - Docker Commands"
+	@echo "====================================="
+	@echo ""
+	@echo "Development:"
+	@echo "  make dev          - Start development environment with live reload"
+	@echo "  make dev-build    - Rebuild and start development environment"
+	@echo "  make shell        - Access Django shell"
+	@echo "  make test         - Run tests"
+	@echo ""
+	@echo "Production:"
+	@echo "  make prod         - Start production environment"
+	@echo "  make build        - Build production containers"
+	@echo "  make deploy       - Deploy to production (pull, build, migrate, restart)"
+	@echo ""
+	@echo "Database:"
+	@echo "  make migrate      - Run database migrations"
+	@echo "  make makemigrations - Create new migrations"
+	@echo "  make createsuperuser - Create Django superuser"
+	@echo "  make backup       - Backup database"
+	@echo "  make dbshell      - Access MariaDB shell"
+	@echo ""
+	@echo "Logs & Monitoring:"
+	@echo "  make logs         - View all container logs"
+	@echo "  make logs-web     - View web container logs"
+	@echo "  make logs-celery  - View celery worker logs"
+	@echo "  make status       - Show container status"
+	@echo ""
+	@echo "Control:"
+	@echo "  make stop         - Stop all containers"
+	@echo "  make restart      - Restart all containers"
+	@echo "  make clean        - Stop and remove containers, networks, volumes"
+	@echo ""
+
+# Development
+dev:
+	docker-compose -f docker-compose.yml -f docker-compose.dev.yml up
+
+dev-build:
+	docker-compose -f docker-compose.yml -f docker-compose.dev.yml up --build
+
+# Production
+prod:
+	docker-compose up -d
+
+build:
+	docker-compose build --no-cache
+
+deploy:
+	@echo "Deploying to production..."
+	git pull
+	docker-compose build
+	docker-compose up -d
+	docker-compose exec web python manage.py migrate
+	docker-compose exec web python manage.py collectstatic --noinput
+	docker-compose restart web
+	@echo "Deployment complete!"
+	@make status
+
+# Database operations
+migrate:
+	docker-compose exec web python manage.py migrate
+
+makemigrations:
+	docker-compose exec web python manage.py makemigrations
+
+createsuperuser:
+	docker-compose exec web python manage.py createsuperuser
+
+dbshell:
+	docker-compose exec mariadb mysql -u keepitgoing -p keepitgoing
+
+backup:
+	@echo "Creating database backup..."
+	@mkdir -p backups
+	docker-compose exec mariadb mysqldump -u root -p keepitgoing > backups/backup-$$(date +%Y%m%d-%H%M%S).sql
+	@echo "Backup created in backups/ directory"
+
+# Django shell and tests
+shell:
+	docker-compose exec web python manage.py shell
+
+test:
+	docker-compose exec web python manage.py test
+
+# Logs
+logs:
+	docker-compose logs -f
+
+logs-web:
+	docker-compose logs -f web
+
+logs-celery:
+	docker-compose logs -f celery-worker
+
+# Control
+stop:
+	docker-compose down
+
+restart:
+	docker-compose restart
+
+status:
+	docker-compose ps
+
+clean:
+	docker-compose down -v
+	@echo "Containers, networks, and volumes removed"