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>

docker/entrypoint.sh

@@ -0,0 +1,103 @@
+#!/bin/bash
+set -e
+
+# Colors for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+NC='\033[0m' # No Color
+
+echo -e "${GREEN}========================================${NC}"
+echo -e "${GREEN}KeepItGoing Docker Entrypoint${NC}"
+echo -e "${GREEN}========================================${NC}"
+
+# Extract database host from DATABASE_URL or use DB_HOST env var
+DB_HOST=${DB_HOST:-mariadb}
+
+# Wait for MariaDB to be ready
+echo -e "${YELLOW}Waiting for MariaDB at ${DB_HOST}...${NC}"
+max_attempts=30
+attempt=0
+
+while ! mysqladmin ping -h"${DB_HOST}" --silent 2>/dev/null; do
+    attempt=$((attempt + 1))
+    if [ $attempt -eq $max_attempts ]; then
+        echo -e "${RED}ERROR: MariaDB did not become available in time${NC}"
+        exit 1
+    fi
+    echo "Waiting for MariaDB... ($attempt/$max_attempts)"
+    sleep 2
+done
+
+echo -e "${GREEN}✓ MariaDB is ready!${NC}"
+
+# Function to run migrations
+run_migrations() {
+    echo -e "${YELLOW}Running database migrations...${NC}"
+    python manage.py migrate --noinput
+    echo -e "${GREEN}✓ Migrations complete${NC}"
+}
+
+# Function to collect static files
+collect_static() {
+    echo -e "${YELLOW}Collecting static files...${NC}"
+    python manage.py collectstatic --noinput
+    echo -e "${GREEN}✓ Static files collected${NC}"
+}
+
+# Determine which service to start based on command argument
+case "$1" in
+    "gunicorn")
+        echo -e "${GREEN}Starting Gunicorn WSGI server...${NC}"
+        run_migrations
+        collect_static
+
+        # Get Gunicorn config from environment or use defaults
+        WORKERS=${GUNICORN_WORKERS:-3}
+        TIMEOUT=${GUNICORN_TIMEOUT:-60}
+
+        echo -e "${GREEN}Configuration:${NC}"
+        echo "  Workers: $WORKERS"
+        echo "  Timeout: $TIMEOUT"
+        echo "  Bind: 0.0.0.0:8000"
+
+        exec gunicorn config.wsgi:application \
+            --bind 0.0.0.0:8000 \
+            --workers $WORKERS \
+            --timeout $TIMEOUT \
+            --access-logfile - \
+            --error-logfile - \
+            --log-level info
+        ;;
+
+    "celery-worker")
+        echo -e "${GREEN}Starting Celery worker...${NC}"
+        # Wait a bit more for web service to run migrations
+        sleep 5
+        exec celery -A config worker \
+            --loglevel=info \
+            --concurrency=2
+        ;;
+
+    "celery-beat")
+        echo -e "${GREEN}Starting Celery beat scheduler...${NC}"
+        # Wait for web service to run migrations and create database tables
+        sleep 10
+        exec celery -A config beat \
+            --loglevel=info \
+            --scheduler django_celery_beat.schedulers:DatabaseScheduler
+        ;;
+
+    "runserver")
+        echo -e "${GREEN}Starting Django development server...${NC}"
+        run_migrations
+        collect_static
+        exec python manage.py runserver 0.0.0.0:8000
+        ;;
+
+    *)
+        # If command is not recognized, just execute it
+        echo -e "${YELLOW}Executing custom command: $@${NC}"
+        exec "$@"
+        ;;
+esac