add application file

Dockerfile

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+FROM python:3.12
+# Create a new user named 'user' with user ID 1000 and create their home directory
+RUN useradd -m -u 1000 user
+# Switch to the newly created user
+USER user
+# Add the user's local bin directory to the PATH
+ENV PATH="/home/user/.local/bin:$PATH"
+# Set the working directory in the container to /app
+WORKDIR /app
+# Copy the requirements.txt file from the host to the container
+# The --chown=user ensures the copied file is owned by our 'user'
+COPY --chown=user ./requirements.txt requirements.txt
+# Install the Python dependencies listed in requirements.txt
+RUN pip install --no-cache-dir --upgrade -r requirements.txt
+# Copy the rest of the application code from the host to the container
+# Again, ensure the copied files are owned by 'user'
+COPY --chown=user . /app
+# Specify the command to run when the container starts
+CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]

app.py

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+from fastapi import FastAPI
+app = FastAPI()
+@app.get("/")
+def greet_json():
+    return {"Hello": "World!"}

requirements.txt

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+fastapi
+uvicorn[standard]