Refactor dockerfile and entrypoint script

Dockerfile

@@ -1,34 +1,39 @@
-FROM nvidia/cuda:12.9.1-cudnn-devel-ubuntu24.04
+FROM nvidia/cuda:12.1.1-cudnn8-runtime-ubuntu22.04
 
 ENV DEBIAN_FRONTEND=noninteractive \
-    LANG=C.UTF-8 \
-    LC_ALL=C.UTF-8 \
-    PATH="/usr/local/bin:/root/.local/bin:/root/bin:/piper/.venv/bin:${PATH}"
+    PIP_DISABLE_PIP_VERSION_CHECK=1 \
+    PYTHONUNBUFFERED=1 \
+    VENV_PATH=/opt/venv
 
-RUN apt-get update && apt upgrade -y && apt-get install -y --no-install-recommends \
-    bash coreutils vim nano \
-    git curl wget ca-certificates gnupg \
-    build-essential pkg-config ninja-build cmake \
-    python3 python3-pip python3-venv python3-dev \
-    ffmpeg espeak-ng \
-    && rm -rf /var/lib/apt/lists/*
-
-COPY --from=ghcr.io/astral-sh/uv:latest /uv /usr/local/bin/uv
-RUN chmod +x /usr/local/bin/uv
+ENV PATH="${VENV_PATH}/bin:${PATH}"
 
 WORKDIR /piper
 
-RUN git clone --depth 1 --branch v1.3.0 https://github.com/OHF-voice/piper1-gpl.git .
-# RUN if ! [ -d wavs ]; then mkdir wavs; fi && if ! [ -d metadata ]; then mkdir metadata; fi && if ! [ -d checkpoints ]; then mkdir checkpoints; fi && if ! [ -d lightning_logs ]; then mkdir lightning_logs; fi && if ! [ -d cache ]; then mkdir cache; fi
-RUN uv python install 3.13 && uv python pin 3.13 && uv venv .venv --python 3.13
+RUN apt-get update \
+ && apt-get install -y --no-install-recommends \
+      build-essential \
+      cmake \
+      espeak-ng \
+      git \
+      ninja-build \
+      pkg-config \
+      python3 \
+      python3-dev \
+      python3-venv \
+ && rm -rf /var/lib/apt/lists/*
 
-RUN uv pip install -e .[train] torch==2.5.1 lightning==2.1.0 numpy "ml_dtypes>=0.5.0" scikit-build \
-    --index https://download.pytorch.org/whl/cu124 \
-    --index https://pypi.org/simple \
-    --index-strategy=unsafe-best-match \
-    --compile-bytecode
+RUN git clone --depth 1 https://github.com/OHF-voice/piper1-gpl.git .
 
-RUN uv run python3 setup.py build_ext --inplace
-RUN . .venv/bin/activate && ./build_monotonic_align.sh
+RUN python3 -m venv ${VENV_PATH}
 
-ENV UV_OFFLINE=1
+RUN pip install --upgrade pip wheel setuptools \
+ && pip install --no-cache-dir cmake scikit-build \
+ && pip install --no-cache-dir -e '.[train]'
+
+RUN ./build_monotonic_align.sh \
+ && python3 setup.py build_ext --inplace
+
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]