added the CUDA-based Dockerfile as default

Dockerfile

@@ -0,0 +1,43 @@
+# Name: Video2X Dockerfile (CUDA)
+# Creator: K4YT3X
+# Date Created: February 3, 2022
+# Last Modified: February 4, 2022
+
+# stage 1: build the python components into wheels
+FROM nvidia/cuda:11.6.0-runtime-ubuntu20.04 AS builder
+ENV DEBIAN_FRONTEND=noninteractive
+
+COPY . /video2x
+WORKDIR /video2x
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends \
+        python3-pip python3-opencv python3-pil python3-tqdm \
+        python3-dev libvulkan-dev glslang-dev glslang-tools \
+        build-essential swig git \
+    && git config --global http.postBuffer 1048576000 \
+    && git config --global https.postBuffer 1048576000 \
+    && pip wheel -w /wheels \
+        wheel setuptools setuptools_scm \
+        rife-ncnn-vulkan-python@git+https://github.com/media2x/rife-ncnn-vulkan-python.git .
+
+# stage 2: install wheels into the final image
+FROM nvidia/cuda:11.6.0-runtime-ubuntu20.04
+LABEL maintainer="K4YT3X <i@k4yt3x.com>" \
+      org.opencontainers.image.source="https://github.com/k4yt3x/video2x" \
+      org.opencontainers.image.description="A lossless video/GIF/image upscaler"
+ENV DEBIAN_FRONTEND=noninteractive
+
+COPY --from=builder /var/lib/apt/lists* /var/lib/apt/lists/
+COPY --from=builder /wheels /wheels
+COPY . /video2x
+WORKDIR /video2x
+RUN apt-get install -y --no-install-recommends \
+        python3-pip python3-dev \
+        python3-opencv python3-pil python3-tqdm \
+        mesa-vulkan-drivers ffmpeg \
+    && pip install --no-cache-dir --no-index -f /wheels . \
+    && apt-get clean \
+    && rm -rf /wheels /video2x /var/lib/apt/lists/*
+
+WORKDIR /host
+ENTRYPOINT ["/usr/bin/python3", "-m", "video2x"]