basic structure setup

rag-chat-backend/Dockerfile

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+FROM python:3.10-slim
+
+WORKDIR /app
+
+COPY ./requirements.txt /app
+
+RUN apt-get update && apt-get install -y build-essential
+RUN pip install --upgrade pip
+RUN pip install -r requirements.txt
+
+EXPOSE 8000
+
+COPY . /app
+
+CMD ["python", "src/app.py"]

rag-chat-backend/requirements.txt

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+uvicorn==0.22.0
+fastapi==0.109.1
+
+minio==7.1.17
+
+opensearch-py==2.3.2
+opensearch-logger==1.3.0
+
+python-dotenv==1.0.0
+python-multipart==0.0.7
+PyPDF2==3.0.1

rag-chat-backend/src/app.py

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+"""FastAPI Backend"""
+
+import uvicorn
+import os
+
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+from dotenv import load_dotenv
+
+from core.config import settings
+
+load_dotenv()
+app = FastAPI()
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+print('OPENSEARCH_USE_SSL')
+print(os.getenv('OPENSEARCH_USE_SSL'))
+print('settings.API_V1_STR')
+print(settings.API_V1_STR)
+
+
+if __name__ == "__main__":
+    uvicorn.run("app:app", host="0.0.0.0", port=8000, reload=True)

rag-chat-backend/src/core/config.py

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+# config.py
+
+class Settings:
+    API_V1_STR: str = "/api"
+
+
+settings = Settings()