Refactor: improve run.sh startup logic and ensure proper permissions

backend/main.py

@@ -0,0 +1,70 @@
+from __future__ import annotations
+
+import os
+
+import requests
+import yaml
+from fastapi import FastAPI, HTTPException
+from pydantic import BaseModel
+
+app = FastAPI(title="AI CI/CD Assistant")
+
+
+def _env(name: str, default: str) -> str:
+    value = os.getenv(name)
+    return value if value else default
+
+
+# Example for local Ollama: http://localhost:11434/api/generate
+OLLAMA_API_URL = _env("OLLAMA_API_URL", "http://host.docker.internal:11434/api/generate")
+
+
+class GenerationRequest(BaseModel):
+    description: str
+    platform: str = "GitHub Actions"  # or GitLab CI
+    model: str = "codellama"
+
+
+def validate_config(config_text: str):
+    try:
+        yaml.safe_load(config_text)
+        return True, "Success"
+    except Exception as e:
+        return False, str(e)
+
+
+@app.get("/health")
+async def health():
+    return {"status": "ok"}
+
+
+@app.post("/generate")
+async def generate_pipeline(req: GenerationRequest):
+    prompt = (
+        f"Write only a valid {req.platform} YAML configuration for: {req.description}. "
+        "No explanations, just code."
+    )
+
+    payload = {"model": req.model, "prompt": prompt, "stream": False}
+
+    try:
+        response = requests.post(OLLAMA_API_URL, json=payload, timeout=60)
+        response.raise_for_status()
+        raw_text = response.json().get("response", "")
+
+        clean_code = raw_text.replace("```yaml", "").replace("```", "").strip()
+        is_valid, error_msg = validate_config(clean_code)
+
+        return {
+            "status": "ok" if is_valid else "error",
+            "config": clean_code,
+            "validation_error": error_msg if not is_valid else None,
+        }
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=f"Ollama error: {str(e)}")
+
+
+if __name__ == "__main__":
+    import uvicorn
+
+    uvicorn.run(app, host="0.0.0.0", port=int(_env("PORT", "8000")))