Added Dockerfile and FastAPI app

Dockerfile

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+# read the doc: https://huggingface.co/docs/hub/spaces-sdks-docker
+# you will also find guides on how best to write your Dockerfile
+
+FROM python:3.12
+
+COPY . /app
+WORKDIR /app
+
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+
+CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]

app.py

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+from fastapi import FastAPI, Response, status
+
+app = FastAPI(docs_url='/', title='Test PyTorch COCO Object Detection')
+
+
+@app.get('/healthcheck')
+async def healthcheck():
+    return Response(status_code=status.HTTP_200_OK)

requirements.txt

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+fastapi
+uvicorn