Dockerfileのパスを修正し、アプリケーションコードと依存関係のコピー先を明示的に指定しました。

Dockerfile

@@ -4,14 +4,14 @@ FROM python:3.12-slim
 WORKDIR /app
 
 # Copy the requirements file and install dependencies
-COPY requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
+COPY ./requirements.txt /app/requirements.txt
+RUN pip install --no-cache-dir -r /app/requirements.txt
 
 # Copy the application code
-COPY app.py .
+COPY ./app.py /app/app.py
 
 # Expose the port the app runs on
 EXPOSE 7860
 
 # Command to run the application
-CMD ["python", "app.py"]
+CMD ["python", "/app/app.py"]