diff --git a/.dockerignore b/.dockerignore
index 3a08484..9414382 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -1,8 +1 @@
 Dockerfile
-.venv
-checkpoints/
-metadata/
-wavs/
-*.wav
-*.ckpt
-*.csv
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index 489770b..e43b0f9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,12 +1 @@
-.venv
-*.wav
-*.ckpt
-*.csv
-*.onnx
-*.json
-*.yaml
-*.yml
-*events*
-.venv
-.mypy_cache
-.drafts/
\ No newline at end of file
+.DS_Store
diff --git a/Dockerfile b/Dockerfile
index 9acf1cb..3b4ae8d 100644
--- a/Dockerfile
+++ b/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"]
diff --git a/entrypoint.sh b/entrypoint.sh
new file mode 100644
index 0000000..7deec3f
--- /dev/null
+++ b/entrypoint.sh
@@ -0,0 +1,26 @@
+#!/bin/bash
+
+set -e
+
+CKPT_DIR="/piper/lightning_logs"
+CKPT=""
+
+if compgen -G "${CKPT_DIR}/version_*/checkpoints/*.ckpt" > /dev/null; then
+  CKPT=$(ls -t ${CKPT_DIR}/version_*/checkpoints/*.ckpt | head -n1)
+  RESUME_ARG="--trainer.resume_from_checkpoint $CKPT"
+
+  echo "Resuming: $CKPT"
+fi
+
+exec python3 -m piper.train fit \
+  --data.voice_name pt_BR-well \
+  --data.espeak_voice pt-br \
+  --data.audio_dir /data/wav/ \
+  --data.batch_size 16 \
+  --data.cache_dir /data/.cache/ \
+  --data.config_path /data/config.json \
+  --data.csv_path /data/metadata.csv \
+  --model.sample_rate 22050 \
+  --trainer.check_val_every_n_epoch 1 \
+  --trainer.max_epochs 10000 \
+  $RESUME_ARG
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index 636fe1c..0000000
--- a/requirements.txt
+++ /dev/null
@@ -1,90 +0,0 @@
-absl-py==2.3.1
-aiohappyeyeballs==2.6.1
-aiohttp==3.13.2
-aiosignal==1.4.0
-attrs==25.4.0
-audioop-lts==0.2.2
-audioread==3.1.0
-certifi==2025.11.12
-cffi==2.0.0
-charset-normalizer==3.4.4
-coloredlogs==15.0.1
-cython==3.2.1
-decorator==5.2.1
-distro==1.9.0
-docstring-parser==0.17.0
-filelock==3.20.0
-flatbuffers==25.9.23
-frozenlist==1.8.0
-fsspec==2024.12.0
-grpcio==1.76.0
-humanfriendly==10.0
-idna==3.11
-importlib-resources==6.5.2
-jinja2==3.1.6
-joblib==1.5.2
-jsonargparse==4.43.0
-lazy-loader==0.4
-librosa==0.11.0
-lightning==2.1.0
-lightning-utilities==0.15.2
-llvmlite==0.45.1
-markdown==3.10
-markupsafe==3.0.3
-ml-dtypes==0.5.3
-mpmath==1.3.0
-msgpack==1.1.2
-multidict==6.7.0
-networkx==3.5
-numba==0.62.1
-numpy==2.3.4
-nvidia-cublas-cu12==12.4.5.8
-nvidia-cuda-cupti-cu12==12.4.127
-nvidia-cuda-nvrtc-cu12==12.4.127
-nvidia-cuda-runtime-cu12==12.4.127
-nvidia-cudnn-cu12==9.1.0.70
-nvidia-cufft-cu12==11.2.1.3
-nvidia-curand-cu12==10.3.5.147
-nvidia-cusolver-cu12==11.6.1.9
-nvidia-cusparse-cu12==12.3.1.170
-nvidia-nccl-cu12==2.21.5
-nvidia-nvjitlink-cu12==12.4.127
-nvidia-nvtx-cu12==12.4.127
-onnx==1.19.1
-onnxruntime==1.23.2
-packaging==24.2
-pathvalidate==3.3.1
-pillow==12.0.0
-piper-tts==1.3.0
-platformdirs==4.5.0
-pooch==1.8.2
-propcache==0.4.1
-protobuf==6.33.1
-pycparser==2.23
-pysilero-vad==2.1.1
-pytorch-lightning==2.5.6
-pyyaml==6.0.3
-requests==2.32.5
-scikit-build==0.18.1
-scikit-learn==1.7.2
-scipy==1.16.3
-setuptools==80.9.0
-soundfile==0.13.1
-soxr==1.0.0
-standard-aifc==3.13.0
-standard-chunk==3.13.0
-standard-sunau==3.13.0
-sympy==1.13.1
-tensorboard==2.20.0
-tensorboard-data-server==0.7.2
-tensorboardx==2.6.4
-threadpoolctl==3.6.0
-torch==2.5.1+cu124
-torchmetrics==1.8.2
-tqdm==4.67.1
-typeshed-client==2.8.2
-typing-extensions==4.15.0
-urllib3==2.5.0
-werkzeug==3.1.3
-wheel==0.45.1
-yarl==1.22.0
\ No newline at end of file