Add application file

Dockerfile

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+FROM python:3.9
+
+# Create a user to avoid running as root
+RUN useradd -m -u 1000 user
+USER user
+
+# Set environment variables
+ENV HOME=/home/user \
+    PATH=/home/user/.local/bin:$PATH
+
+# Set working directory
+WORKDIR $HOME/app
+
+# Copy project files with proper ownership
+COPY --chown=user . $HOME/app
+
+# Copy and install dependencies
+COPY ./requirements.txt $HOME/app/requirements.txt
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Run the application
+CMD ["chainlit", "run", "app.py", "--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]