Add apt.txt for system dependencies (portaudio, ffmpeg, etc.) and remove Dockerfile

Dockerfile

@@ -1,24 +0,0 @@
-# Dockerfile
-FROM python:3.10-slim
-
-# install system deps for audio + ffmpeg
-RUN apt-get update && \
-    apt-get install -y --no-install-recommends \
-      portaudio19-dev \
-      ffmpeg \
-      libsm6 \
-      libxext6 \
-    && rm -rf /var/lib/apt/lists/*
-
-# set working dir
-WORKDIR /home/user/app
-
-# copy everything in
-COPY . .
-
-# upgrade pip & install Python deps
-RUN pip install --upgrade pip && \
-    pip install --no-cache-dir -r requirements.txt
-
-# finally launch
-CMD ["python", "app.py"]

apt.txt

@@ -0,0 +1,4 @@
+portaudio19-dev
+ffmpeg
+libsm6
+libxext6