fix: install deps as root before switching to non-root user

Dockerfile

@@ -1,7 +1,7 @@
 # Use a lightweight python image
 FROM python:3.10-slim
 
-# Install required system packages first (as root)
+# Install required system packages (as root)
 RUN apt-get update && apt-get install -y \
     ffmpeg \
     espeak-ng \
@@ -12,23 +12,21 @@ RUN apt-get update && apt-get install -y \
 # Install uv for blazing-fast pip installs
 RUN pip install uv
 
-# Hugging Face Spaces requires a non-root user
-RUN useradd -m -u 1000 user
-USER user
-ENV PATH="/home/user/.local/bin:$PATH"
-
-# Set working directory
-WORKDIR /app
-
-# Copy requirements first for better Docker layer caching
-COPY --chown=user:user requirements-ci-english.txt requirements-ci-hindi.txt ./
+# Copy requirements first for Docker layer caching
+COPY requirements-ci-english.txt requirements-ci-hindi.txt ./
 
-# Install Python dependencies with uv (10x faster than pip)
+# Install ALL Python deps as root (before switching user)
 RUN uv pip install --system --no-cache fastapi uvicorn pydantic
 RUN uv pip install --system --no-cache -r requirements-ci-english.txt
 RUN uv pip install --system --no-cache -r requirements-ci-hindi.txt
 
-# Copy the rest of the project
+# Now create non-root user (HF Spaces requirement)
+RUN useradd -m -u 1000 user
+USER user
+ENV PATH="/home/user/.local/bin:$PATH"
+
+# Set working directory and copy project
+WORKDIR /app
 COPY --chown=user:user . /app
 
 # Hugging Face Spaces routes traffic to port 7860