Fix Dockerfile: add python3-dev and cmake/ninja pip packages

Dockerfile

@@ -1,37 +1,38 @@
 # WayyDB API Docker Image for Hugging Face Spaces
 FROM python:3.12-slim
 
-# Install build dependencies
+# Install build dependencies (including Python headers for pybind11)
 RUN apt-get update && apt-get install -y \
     build-essential \
     cmake \
     ninja-build \
     git \
+    python3-dev \
     && rm -rf /var/lib/apt/lists/*
 
 # Create non-root user (required by HF Spaces)
 RUN useradd -m -u 1000 user
+
+# Create data directory before switching user
+RUN mkdir -p /home/user/data/wayydb && chown -R user:user /home/user
+
 USER user
 ENV HOME=/home/user \
-    PATH=/home/user/.local/bin:$PATH
+    PATH=/home/user/.local/bin:$PATH \
+    WAYY_DATA_PATH=/home/user/data/wayydb \
+    PORT=7860
 
 WORKDIR $HOME/app
 
 # Copy source
 COPY --chown=user . .
 
-# Build and install wayyDB
+# Build and install wayyDB (verbose for debugging)
 RUN pip install --no-cache-dir --upgrade pip && \
-    pip install --no-cache-dir build scikit-build-core pybind11 numpy && \
-    pip install --no-cache-dir . && \
+    pip install --no-cache-dir build scikit-build-core pybind11 numpy cmake ninja && \
+    pip install --no-cache-dir -v . && \
     pip install --no-cache-dir -r api/requirements.txt
 
-# Create data directory
-RUN mkdir -p $HOME/data/wayydb
-
-ENV WAYY_DATA_PATH=$HOME/data/wayydb
-ENV PORT=7860
-
 EXPOSE 7860
 
 CMD ["uvicorn", "api.main:app", "--host", "0.0.0.0", "--port", "7860"]