Include nightly in main base image

Author: RossBrunton

.github/workflows/sycl-containers.yaml

@@ -77,9 +77,6 @@ jobs:
               base_image=ghcr.io/intel/llvm/ubuntu2404_build
               base_tag=latest
               use_unstable_driver=false
-          - name: LLVM Nightly Ubuntu 24.04 Docker image
-            file: ubuntu2404_llvm_nightly
-            tag: latest
     steps:
       - name: Checkout
         uses: actions/checkout@v4

devops/containers/ubuntu2404_base.Dockerfile

@@ -4,6 +4,12 @@ ENV DEBIAN_FRONTEND=noninteractive
 
 USER root
 
+# Configure LLVM nightly repo
+RUN apt-get update -qq
+RUN apt-get install -yqq curl
+RUN curl -sSL https://apt.llvm.org/llvm-snapshot.gpg.key -o /etc/apt/trusted.gpg.d/apt.llvm.org.asc
+RUN echo 'deb http://apt.llvm.org/noble/ llvm-toolchain-noble main' > /etc/apt/sources.list.d/llvm.list
+
 # Install SYCL prerequisites
 COPY scripts/install_build_tools.sh /install.sh
 RUN /install.sh