diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..fc166f1
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,13 @@
+# image for usage in ci pipeline
+FROM ubuntu:22.04
+
+ARG DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get update && apt-get -y install apt-utils sudo
+
+RUN useradd -m testuser && echo "testuser:testuserpw" | chpasswd && usermod -aG sudo testuser
+RUN echo "testuser ALL=(ALL:ALL) NOPASSWD: ALL" | sudo tee /etc/sudoers.d/testuser
+
+USER testuser
+CMD /bin/bash
+WORKDIR /home/testuser
diff --git a/src/main/kotlin/org/domaindrivenarchitecture/provs/framework/core/docker/dockerimages/DockerImages.kt b/src/main/kotlin/org/domaindrivenarchitecture/provs/framework/core/docker/dockerimages/DockerImages.kt
index 94c69a2..1a62a1b 100644
--- a/src/main/kotlin/org/domaindrivenarchitecture/provs/framework/core/docker/dockerimages/DockerImages.kt
+++ b/src/main/kotlin/org/domaindrivenarchitecture/provs/framework/core/docker/dockerimages/DockerImages.kt
@@ -21,8 +21,8 @@ FROM ubuntu:22.04
 
 ARG DEBIAN_FRONTEND=noninteractive
 
-RUN apt-get update && apt-get -y install adduser sudo
-RUN useradd -m $userName && echo "$userName:$userName" | chpasswd && adduser $userName sudo
+RUN apt-get update && apt-get -y install sudo
+RUN useradd -m $userName && echo "$userName:$userName" | chpasswd && usermod -aG sudo $userName
 RUN echo "$userName ALL=(ALL:ALL) NOPASSWD: ALL" | sudo tee /etc/sudoers.d/$userName
 
 USER $userName
diff --git a/src/test/kotlin/org/domaindrivenarchitecture/provs/framework/core/platformTest/UbuntuProvTest.kt b/src/test/kotlin/org/domaindrivenarchitecture/provs/framework/core/platformTest/UbuntuProvTest.kt
index 0ce8d9c..7128485 100644
--- a/src/test/kotlin/org/domaindrivenarchitecture/provs/framework/core/platformTest/UbuntuProvTest.kt
+++ b/src/test/kotlin/org/domaindrivenarchitecture/provs/framework/core/platformTest/UbuntuProvTest.kt
@@ -124,8 +124,8 @@ FROM ubuntu:22.04
 
 ARG DEBIAN_FRONTEND=noninteractive
 
-RUN apt-get update && apt-get -y install adduser sudo
-RUN useradd -m $userName && echo "$userName:$userName" | chpasswd && adduser $userName sudo
+RUN apt-get update && apt-get -y install sudo
+RUN useradd -m $userName && echo "$userName:$userName" | chpasswd && usermod -aG sudo $userName
 
 USER $userName
 CMD /bin/bash