diff --git a/.gitea/workflows/demo.yaml b/.gitea/workflows/demo.yaml
index c537cc6..3fab61a 100644
--- a/.gitea/workflows/demo.yaml
+++ b/.gitea/workflows/demo.yaml
@@ -4,7 +4,7 @@ on: [push]
 
 jobs:
   Explore-Gitea-Actions:
-    runs-on: ubuntu-latest
+    runs-on: gitea.gregorlohaus.com/gregor/graal
     steps:
       - run: echo "🎉 The job was automatically triggered by a ${{ gitea.event_name }} event."
       - run: echo "🐧 This job is now running on a ${{ runner.os }} server hosted by Gitea!"
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..3a14f68
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,12 @@
+FROM postgres:15.17-trixie
+RUN apt update
+RUN apt install -y curl wget zip unzip build-essential zlib1g-dev
+RUN curl -s "https://get.sdkman.io?ci=true" | bash
+SHELL ["/bin/bash", "-c"]
+RUN source "/root/.sdkman/bin/sdkman-init.sh" \
+  && sdk install java 25.0.2-graalce \
+  && sdk install gradle
+ENV POSTGRES_PASSWORD=gtransfer
+ENV POSTGRES_USER=gtransfer
+ENV POSTGRES_DB=gtransfer
+ENTRYPOINT ["/bin/bash"]