Added app files

Dockerfile

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+FROM python:3.13-slim
+ADD . /app
+WORKDIR /app
+RUN pip install --no-cache-dir -r requirements.txt
+CMD gunicorn app:server --bind :${PORT:-7860}

app.py

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+from fast_dash import FastDash
+
+# Write the main callback function here
+def simple_text_to_text(input_text: str) -> str:
+    return input_text
+
+
+# Initialize your FastDash application here
+app = FastDash(simple_text_to_text, port=7860)
+
+server = app.server
+
+if __name__ == '__main__':
+    app.run()

requirements.txt

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+fast-dash
+gunicorn