Add Dockerfile example (#828)

docker/Dockerfile

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+FROM nvidia/cuda:12.0.0-runtime-ubuntu20.04
+
+WORKDIR /root
+RUN apt-get update -y && apt-get install -y python3 python3-pip libcudnn8 libcudnn8-dev
+COPY infer.py jfk.flac ./
+RUN pip3 install faster-whisper
+
+ENTRYPOINT ["python3", "infer.py"]

docker/infer.py

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+from faster_whisper import WhisperModel
+
+jfk_path = "jfk.flac"
+model = WhisperModel("tiny", device="cuda")
+segments, info = model.transcribe(jfk_path, word_timestamps=True)
+for segment in segments:
+    print("[%.2fs -> %.2fs] %s" % (segment.start, segment.end, segment.text))