feat: add initial health-check application

.gitignore

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+__pycache__/
+*.py[cod]
+.venv/
+.env
+*.log

README.md

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+# DevOps Platform
+
+Учебный проект для практики DevOps в течение 3 месяцев.
+
+## Application
+
+Минимальный HTTP-сервис на Python без внешних зависимостей.
+
+## Endpoints
+
+- GET /       — информация о приложении
+- GET /health — проверка работоспособности
+- Другие пути — HTTP 404
+
+## Local run
+
+    python3 app/app.py
+
+Приложение слушает 127.0.0.1:8000.
+
+## Health check
+
+    curl -i http://127.0.0.1:8000/health
+
+## Roadmap
+
+1. Git workflow
+2. Docker and Compose
+3. GitLab CI/CD
+4. Ansible
+5. Terraform
+6. Prometheus and Grafana
+7. Kubernetes

app/app.py

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+import json
+from http.server import BaseHTTPRequestHandler, HTTPServer
+
+
+class Handler(BaseHTTPRequestHandler):
+    def do_GET(self):
+        if self.path == "/health":
+            status = 200
+            body = {"status": "ok"}
+        elif self.path == "/":
+            status = 200
+            body = {
+                "application": "devops-platform",
+                "version": "1.0.0"
+            }
+        else:
+            status = 404
+            body = {"error": "not found"}
+
+        payload = json.dumps(body).encode("utf-8")
+
+        self.send_response(status)
+        self.send_header("Content-Type", "application/json")
+        self.send_header("Content-Length", str(len(payload)))
+        self.end_headers()
+        self.wfile.write(payload)
+
+    def log_message(self, format, *args):
+        print(f"{self.client_address[0]} - {format % args}")
+
+
+if __name__ == "__main__":
+    server = HTTPServer(("127.0.0.1", 8000), Handler)
+    print("Listening on http://127.0.0.1:8000")
+    server.serve_forever()