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Step 1:

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Option A: Use Our Example Application

Create a new directory for your project: 
mkdir ~/my-first-dstack-app
cd ~/my-first-dstack-app
Create a simple Python Flask application: 
# app.py
from flask import Flask, jsonify
import os
import socket

app = Flask(__name__)

@app.route('/')
def hello():
    return jsonify({
        'message': 'Hello from dstack! 🔒',
        'secure': 'Running in a Trusted Execution Environment',
        'hostname': socket.gethostname(),
        'environment': os.environ.get('DSTACK_ENV', 'production')
    })

@app.route('/health')
def health():
    return jsonify({'status': 'healthy'}), 200

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=8080)
Create a requirements file: 
# requirements.txt
flask==3.0.0
gunicorn==21.2.0
Create a Dockerfile: 
# Dockerfile
FROM python:3.11-slim

WORKDIR /app

COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

COPY app.py .

EXPOSE 8080

CMD ["gunicorn", "--bind", "0.0.0.0:8080", "--workers", "2", "app:app"]