Reorganising build.gradle for CUDA 12

Signed-off-by: brian <brian@brutex.de>

.gitea/workflows/demo.yaml

@@ -2,6 +2,12 @@ name: Gitea Actions Demo
 run-name: ${{ gitea.actor }} is testing out Gitea Actions 🚀
 on: [push]
 
+env:
+  OS: ubuntu2004
+  cudnn_version: 8.9.4.25
+  cuda_version: cuda12.2
+  CMAKE_VER: 3.27.4
+
 jobs:
   Explore-Gitea-Actions:
     runs-on: ubuntu-20.04:docker://nvidia/cuda:12.2.0-devel-ubuntu20.04
@@ -17,11 +23,26 @@ jobs:
         run: |
           ls ${{ gitea.workspace }}
 
+      - name: Update initial docker image with apt-get
+        run: |
+          apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y wget software-properties-common && \
+          wget https://developer.download.nvidia.com/compute/cuda/repos/${OS}/x86_64/cuda-${OS}.pin && \
+          mv cuda-${OS}.pin /etc/apt/preferences.d/cuda-repository-pin-600 && \
+          apt-key adv --fetch-keys https://developer.download.nvidia.com/compute/cuda/repos/${OS}/x86_64/7fa2af80.pub && \
+          add-apt-repository "deb https://developer.download.nvidia.com/compute/cuda/repos/${OS}/x86_64/ /"
+
+
+          RUN apt-get update && apt-get upgrade -y &&  \
+              DEBIAN_FRONTEND=noninteractive apt-get install -y openjdk-11-jdk \
+              build-essential checkinstall zlib1g-dev libssl-dev git libpthread-stubs0-dev \
+              libcudnn8=${cudnn_version}-1+${cuda_version} libcudnn8-dev=${cudnn_version}-1+${cuda_version} \
+              cuda-drivers
       - name: Setup Java
         uses: actions/setup-java@v3
         with:
           distribution: 'temurin' # See 'Supported distributions' for available options
           java-version: '11'
+          cache: 'gradle'
 
       - name: Install CMake and Ninja
         uses: lukka/get-cmake@latest