Add initial codebase

backend/Dockerfile

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+FROM python:3.13.5-alpine
+
+WORKDIR /app
+
+COPY requirements.txt ./
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+
+EXPOSE 5000
+CMD ["flask", "--app", "src.app", "run", "--debug", "--host=0.0.0.0"]
+# flask --app src.app run --host=0.0.0.0 --port=5001 --debug

backend/requirements.txt

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+Flask==3.1.0
+flask-cors

backend/src/app.py

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+from flask import Flask
+from flask_cors import CORS
+
+app = Flask(__name__)
+CORS(app)
+
+
+@app.route("/api")
+def index():
+    return "hello from flask"
+
+
+if __name__ == "__main__":
+    app.run(debug=True)