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app/main.py

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+from fastapi import FastAPI
+
+app = FastAPI()
+
+@app.get("/")
+def read_root():
+    return {"message": "✅ Hello from FastAPI in Docker Space!"}

dockerfile

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+FROM python:3.10
+
+WORKDIR /app
+
+COPY . /app
+
+RUN pip install --no-cache-dir -r requirements.txt
+
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "7860"]

requirements.txt

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+fastapi
+uvicorn