add Mesa Vulkan drivers for GPU compute workloads

Enables Vulkan-based GPU acceleration for containerized workloads
like ollama/llama.cpp on Radeon 780M iGPUs without needing ROCm.

build-image.sh

@@ -138,6 +138,12 @@ apt-get install -y \
     containerd \
     runc
 
+# Vulkan drivers for GPU compute workloads (ollama, llama.cpp)
+apt-get install -y \
+    mesa-vulkan-drivers \
+    libvulkan1 \
+    vulkan-tools
+
 # Useful tools
 apt-get install -y \
     htop \