Fix Dockerfile startup command

Dockerfile

@@ -33,8 +33,6 @@ WORKDIR /app
 RUN git clone --depth 1 https://github.com/RVC-Boss/GPT-SoVITS.git .
 
 
-# Hugging Face Docker Spaces route traffic to port 7860.
-# The Russian model card requires vocab size 753 and Russian base checkpoints.
 RUN python - <<'PY'
 from pathlib import Path
 
@@ -61,12 +59,11 @@ RUN source /opt/conda/etc/profile.d/conda.sh && \
     conda activate GPTSoVits && \
     bash install.sh --device CPU --source HF && \
     pip install --no-cache-dir epitran \
-    "fastapi[standard]==0.115.2" \
-    "starlette==0.40.0" \
-    "gradio==4.44.1"
+      "fastapi[standard]==0.115.2" \
+      "starlette==0.40.0" \
+      "gradio==4.44.1"
 
 
-# Russian GPT-SoVITS weights from https://huggingface.co/fuckSelf/GPT-SoVITS-Russian
 RUN mkdir -p GPT_SoVITS/pretrained_models/v2Pro GPT_weights_v2ProPlus SoVITS_weights_v2ProPlus && \
     curl -L --retry 5 -o GPT_SoVITS/pretrained_models/s1v3-ru.ckpt \
       https://huggingface.co/fuckSelf/GPT-SoVITS-Russian/resolve/main/s1v3-ru.ckpt && \
@@ -78,10 +75,5 @@ RUN mkdir -p GPT_SoVITS/pretrained_models/v2Pro GPT_weights_v2ProPlus SoVITS_wei
       https://huggingface.co/fuckSelf/GPT-SoVITS-Russian/resolve/main/ru-base_e10_s123570.pth
 
 
-RUN cat > /app/start-space.sh <<'SH'
-#!/usr/bin/env bash
-set -euxo pipefail
-source /opt/conda/etc/profile.d/conda.sh
-conda activate GPTSoVits
-cd /app
-
+EXPOSE 7860
+CMD ["bash", "-lc", "source /opt/conda/etc/profile.d/conda.sh && conda activate GPTSoVits && cd /app && echo '=== GPT-SoVITS startup on 7860 ===' && python -u webui.py"]