feat: add Docker containerization support

- Add Dockerfile for SenseNet client application
- Add docker-compose.dev.yml for development with hot reload
- Add docker-compose.prod.yml for production deployment
- Add .dockerignore for optimized builds
- Add .env.example for environment configuration

Usage:
- Development: docker-compose -f docker-compose.dev.yml up -d
- Production: docker-compose -f docker-compose.prod.yml up -d

Author: VargaJoe

.dockerignore

@@ -0,0 +1,42 @@
+# Node modules (will be installed in container)
+node_modules
+*/node_modules
+**/node_modules
+
+# Build outputs
+dist
+build
+coverage
+*.tsbuildinfo
+
+# Development files
+.git
+.github
+.vscode
+*.log
+# Note: We need yarn.lock and package-lock.json for dependency resolution
+# *.lock
+
+# Docker
+*.dockerignore
+Dockerfile*
+docker-compose*
+.docker
+
+# Docker volumes
+docker_data/
+docker_volumes/
+
+# Development
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+# Cypress
+cypress/videos
+cypress/screenshots
+
+# Misc
+.DS_Store
+Thumbs.db

.env.example

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+# Environment Variables for Docker Compose
+# Copy this file to .env and modify as needed
+
+# Authentication Type (SNAuth or IdentityServer)
+AUTH_TYPE=SNAuth
+
+# Node Environment
+NODE_ENV=production
+
+# Ports
+SENSENET_CLIENT_PORT=8080
+SENSENET_DEV_PORT=3000
+
+# Development Settings (for hot reload)
+CHOKIDAR_USEPOLLING=true
+WATCHPACK_POLLING=true
+
+# Database Settings (if using database service)
+# DB_PASSWORD=YourPassword123!
+# DB_NAME=SenseNet
+# DB_USER=sa
+
+# Redis Settings (if using redis service)
+# REDIS_PASSWORD=
+
+# Traefik Settings (if using traefik service)
+# TRAEFIK_DOMAIN=sensenet.local
+
+# Backend API URL (if connecting to external backend)
+# REACT_APP_SERVICE_URL=https://dev.demo.sensenet.com
+# REACT_APP_IDENTITY_SERVER_URL=https://is.demo.sensenet.com

Dockerfile

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+# Development Dockerfile for SenseNet client with hot reload
+FROM node:20-alpine
+
+# Set working directory
+WORKDIR /app
+
+# Copy everything (dockerignore excludes unwanted files)
+COPY . .
+
+# Install dependencies
+RUN yarn install
+
+# Build packages (required for the app to work)
+RUN yarn build
+
+# Expose port
+EXPOSE 8080
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=3s --start-period=60s --retries=3 \
+    CMD wget --no-verbose --tries=1 --spider http://localhost:8080/ || exit 1
+
+# Default command (overridden in docker-compose for hot reload)
+CMD ["yarn", "snapp", "start"]

docker-compose.dev.yml

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+version: "3.8"
+
+services:
+  sensenet-dev:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    container_name: sensenet-dev
+    ports:
+      - "8080:8080"
+    environment:
+      - NODE_ENV=development
+      - AUTH_TYPE=SNAuth
+      - CHOKIDAR_USEPOLLING=true
+      - WATCHPACK_POLLING=true
+    volumes:
+      - .:/app
+      - /app/node_modules
+      - /app/packages/*/node_modules
+      - /app/apps/*/node_modules
+    command: yarn snapp start
+    restart: unless-stopped

docker-compose.prod.yml

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+version: "3.8"
+
+services:
+  sensenet-app:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    container_name: sensenet-app
+    ports:
+      - "8080:8080"
+    environment:
+      - NODE_ENV=production
+      - AUTH_TYPE=SNAuth
+    restart: unless-stopped