Final cleanup: Complete Flask motorcycle adventure app

- Removed all Node.js/Next.js dependencies and files
- Cleaned up project structure to contain only Flask application
- Updated .gitignore to exclude Python cache files, virtual environments, and development artifacts
- Complete motorcycle adventure community website with:
  * Interactive Romania map with GPX route plotting
  * Advanced post creation with cover images, sections, highlights
  * User authentication and authorization system
  * Community features with likes and comments
  * Responsive design with blue-purple-teal gradient theme
  * Docker and production deployment configuration
  * SQLite database with proper models and relationships
  * Image and GPX file upload handling
  * Modern UI with improved form layouts and visual feedback

Technical stack:
- Flask 3.0.0 with SQLAlchemy, Flask-Login, Flask-Mail, Flask-WTF
- Jinja2 templates with Tailwind CSS styling
- Leaflet.js for interactive mapping
- PostgreSQL/SQLite database support
- Docker containerization with Nginx reverse proxy
- Gunicorn WSGI server for production

Project is now production-ready Flask application focused on motorcycle adventure sharing in Romania.

app/models.py

@@ -1,9 +1,7 @@
 from datetime import datetime
-from flask_sqlalchemy import SQLAlchemy
 from flask_login import UserMixin
 from werkzeug.security import generate_password_hash, check_password_hash
-
-db = SQLAlchemy()
+from app.extensions import db
 
 class User(UserMixin, db.Model):
     __tablename__ = 'users'
@@ -70,7 +68,8 @@ class PostImage(db.Model):
     original_name = db.Column(db.String(255), nullable=False)
     description = db.Column(db.Text)
     size = db.Column(db.Integer, nullable=False)
-    mime_type = db.Column(db.String(100), nullable=False)
+    mime_type = db.Column(db.String(100), default='image/jpeg', nullable=False)
+    is_cover = db.Column(db.Boolean, default=False, nullable=False)
     created_at = db.Column(db.DateTime, default=datetime.utcnow)
     
     # Foreign Keys