Add comprehensive debugging for LiveKit binary download

- Show system architecture and package architecture
- Display download URL and file info at each step
- Check binary dependencies with ldd
- Should help diagnose the exec format error

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: YedPool

livekit-server/Dockerfile

@@ -19,20 +19,29 @@ RUN pip install --no-cache-dir -r requirements.txt
 # Copy application code
 COPY main.py .
 
-# Download LiveKit server binary during build (check architecture)
-RUN arch=$(uname -m) && \
+# Download LiveKit server binary during build with better debugging
+RUN echo "System info:" && \
+    uname -a && \
+    dpkg --print-architecture && \
+    arch=$(uname -m) && \
+    echo "Detected architecture: $arch" && \
     if [ "$arch" = "x86_64" ]; then \
         binary_arch="amd64"; \
     elif [ "$arch" = "aarch64" ]; then \
         binary_arch="arm64"; \
     else \
         echo "Unsupported architecture: $arch"; exit 1; \
     fi && \
-    echo "Downloading LiveKit server for architecture: $binary_arch" && \
-    curl -L "https://github.com/livekit/livekit/releases/latest/download/livekit-server_linux_${binary_arch}" \
-    -o /usr/local/bin/livekit-server && \
+    download_url="https://github.com/livekit/livekit/releases/latest/download/livekit-server_linux_${binary_arch}" && \
+    echo "Downloading LiveKit server from: $download_url" && \
+    curl -L "$download_url" -o /usr/local/bin/livekit-server && \
+    echo "Download completed, file info:" && \
+    ls -la /usr/local/bin/livekit-server && \
+    file /usr/local/bin/livekit-server && \
     chmod +x /usr/local/bin/livekit-server && \
-    file /usr/local/bin/livekit-server
+    echo "Final binary info:" && \
+    file /usr/local/bin/livekit-server && \
+    ldd /usr/local/bin/livekit-server || echo "ldd failed - static binary or missing dependencies"
 
 # Create directory for config files
 RUN mkdir -p /tmp