Migrate from Quart to Flask and add MariaDB dynamic database

Major Changes:
- Migrated web framework from Quart (async) to Flask (sync)
- Added MariaDB database integration with SQLAlchemy ORM
- Implemented dynamic content management for portfolio

New Features:
- Database models for Profile, Skills, Projects, ProjectTags, and SocialLinks
- RESTful API endpoints for CRUD operations on all entities
- Database initialization script (init_db.py) with sample data
- Docker Compose configuration with MariaDB service

Modified Files:
- app.py: Replaced Quart with Flask, added database initialization
- config.py: Added database configuration with environment variables
- routes/home.py: Converted async to sync, added database queries
- requirements.txt: Replaced Quart/Hypercorn with Flask/Gunicorn, added Flask-SQLAlchemy and PyMySQL
- docker-compose.yml: Added MariaDB service with health checks
- templates/: Updated all templates to use dynamic data from database with Jinja2
- .env.example: Added database configuration variables
- README.md: Complete rewrite with new setup instructions and API documentation

New Files:
- models.py: SQLAlchemy models for all database entities
- init_db.py: Database initialization script
- routes/api.py: REST API endpoints for content management

Benefits:
- Simplified architecture (sync vs async)
- Better ecosystem compatibility
- Dynamic content management via database
- Easy content updates through REST API
- Improved deployment with standard WSGI server (Gunicorn)

docker-compose.yml

@@ -1,20 +1,51 @@
 version: "3.9"
 
 services:
-  quartapp:
+  mariadb:
+    image: mariadb:11.2
+    container_name: portfolio_mariadb
+    restart: always
+    environment:
+      MYSQL_ROOT_PASSWORD: root_password_change_me
+      MYSQL_DATABASE: portfolio_db
+      MYSQL_USER: portfolio_user
+      MYSQL_PASSWORD: portfolio_password
+    volumes:
+      - mariadb_data:/var/lib/mysql
+    ports:
+      - "127.0.0.1:3306:3306"
+    healthcheck:
+      test: ["CMD", "healthcheck.sh", "--connect", "--innodb_initialized"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
+  flaskapp:
     image: python:3.10-slim
-    container_name: quartapp
+    container_name: portfolio_flaskapp
     working_dir: /app
     ports:
       - "127.0.0.1:5000:5000"
     restart: always
+    depends_on:
+      mariadb:
+        condition: service_healthy
     command: >
       sh -c "
         apt-get update &&
-        apt-get install -y git &&
+        apt-get install -y git default-libmysqlclient-dev build-essential pkg-config &&
         [ -d /app/.git ] || git clone https://github.com/BluLupo/hersel.it.git /app &&
         pip install --no-cache-dir -r requirements.txt &&
-        hypercorn -c hypercorn_config.toml app:app
+        python init_db.py &&
+        gunicorn -w 4 -b 0.0.0.0:5000 app:app
       "
     environment:
       - PYTHONUNBUFFERED=1
+      - DB_HOST=mariadb
+      - DB_PORT=3306
+      - DB_USER=portfolio_user
+      - DB_PASSWORD=portfolio_password
+      - DB_NAME=portfolio_db
+
+volumes:
+  mariadb_data: