Add Jenkins setup

jenkins/Dockerfile.jenkins

@@ -0,0 +1,12 @@
+FROM jenkins/jenkins:lts
+
+USER root
+
+RUN apt-get update \
+ && apt-get install -y docker.io curl \
+ && curl -L https://github.com/docker/compose/releases/download/v2.27.0/docker-compose-linux-x86_64 \
+      -o /usr/local/bin/docker-compose \
+ && chmod +x /usr/local/bin/docker-compose \
+ && rm -rf /var/lib/apt/lists/*
+
+USER jenkins