diff --git a/docker-compose.yml b/docker-compose.yml
index 086b985..86a575d 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -113,6 +113,23 @@ services:
     depends_on:
       postgres:
         condition: service_healthy
+  kontor-javalin:
+    build:
+      context: ./kontor-javalin
+      dockerfile: Dockerfile
+      tags:
+        - kontor-javalin:0.2.0-SNAPSHOT
+    image: kontor-javalin:0.2.0-SNAPSHOT
+    restart: unless-stopped
+    networks:
+      - database
+      - integration
+      - frontend
+    ports:
+      - 8400:8400
+    depends_on:
+      postgres:
+        condition: service_healthy
 
 networks:
   integration:
diff --git a/kontor-javalin/Dockerfile b/kontor-javalin/Dockerfile
index 1cfd701..be483c1 100644
--- a/kontor-javalin/Dockerfile
+++ b/kontor-javalin/Dockerfile
@@ -1,5 +1,28 @@
-FROM alpine/java:21-jdk
+# ----------------------------------------------------------------------- #
+FROM gradle:9.2.1-jdk AS builder
 WORKDIR /
-ADD build/libs/kontor-spring-0.2.0-SNAPSHOT.jar app.jar
-EXPOSE 8000
-CMD ["java", "-jar", "-Dspring.profiles.active=prod", "-Dvaadin.productionMode=true", "app.jar"]
+COPY ./api/src/main/ ./api/src/main/
+COPY ./api/build.gradle ./api/
+COPY ./models/src/main/ ./models/src/main/
+COPY ./models/build.gradle ./models/
+COPY ./services/src/main/ ./services/src/main/
+COPY ./services/build.gradle ./services/
+COPY ./build.gradle ./
+COPY ./gradle.properties ./
+COPY ./settings.gradle ./
+COPY ./gradle/libs.versions.toml ./gradle/
+RUN gradle build --no-daemon
+
+# ----------------------------------------------------------------------- #
+FROM alpine/java:21-jdk AS run
+
+RUN adduser --system appuser
+USER appuser
+
+COPY --from=builder --chown=appuser:appuser /api/build/libs/api-0.2.0-SNAPSHOT.jar app.jar
+
+EXPOSE 8400
+USER appuser
+
+CMD ["java", "-jar", "app.jar"]
+
diff --git a/kontor-javalin/api/src/main/java/de/thpeetz/kontor/api/Main.java b/kontor-javalin/api/src/main/java/de/thpeetz/kontor/api/Main.java
index 32ee536..5f887a5 100644
--- a/kontor-javalin/api/src/main/java/de/thpeetz/kontor/api/Main.java
+++ b/kontor-javalin/api/src/main/java/de/thpeetz/kontor/api/Main.java
@@ -1,16 +1,16 @@
 package de.thpeetz.kontor.api;
 
-import com.fasterxml.jackson.databind.ObjectMapper;
-import io.javalin.Javalin;
 import de.thpeetz.kontor.services.api.PersonReader;
+import io.javalin.Javalin;
+import java.util.ServiceLoader;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import com.fasterxml.jackson.databind.ObjectMapper;
 
-import java.util.ServiceLoader;
 
 public class Main {
     private static Logger logger = LoggerFactory.getLogger(Main.class);
-    private static short port = 7312;
+    private static short port = 8400;
 
     public static void main(String[] args) {
         var personReader = ServiceLoader.load(PersonReader.class).findFirst().get(); // <-- Getting an implementation
diff --git a/kontor-spring/Dockerfile b/kontor-spring/Dockerfile
index 1cfd701..655c32e 100644
--- a/kontor-spring/Dockerfile
+++ b/kontor-spring/Dockerfile
@@ -1,5 +1,23 @@
-FROM alpine/java:21-jdk
+# ----------------------------------------------------------------------- #
+FROM gradle:8.7-jdk AS builder
 WORKDIR /
-ADD build/libs/kontor-spring-0.2.0-SNAPSHOT.jar app.jar
-EXPOSE 8000
+COPY ./src/main/ ./src/main/
+COPY ./frontend/ ./frontend/
+COPY ./build.gradle ./
+COPY ./gradle.properties ./
+COPY ./settings.gradle ./
+COPY ./gradle/libs.versions.toml ./gradle/
+RUN gradle bootJar --no-daemon
+
+# ----------------------------------------------------------------------- #
+FROM alpine/java:21-jdk AS run
+
+RUN adduser --system appuser
+USER appuser
+
+COPY --from=builder --chown=appuser:appuser /build/libs/kontor-spring-0.2.0-SNAPSHOT.jar app.jar
+
+EXPOSE 8100
+USER appuser
 CMD ["java", "-jar", "-Dspring.profiles.active=prod", "-Dvaadin.productionMode=true", "app.jar"]
+
diff --git a/kontor-spring/src/main/resources/logback-spring.xml b/kontor-spring/src/main/resources/logback-spring.xml
index b085f8c..a8f961d 100644
--- a/kontor-spring/src/main/resources/logback-spring.xml
+++ b/kontor-spring/src/main/resources/logback-spring.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <configuration>
 
-    <property name="LOGS" value="./logs" />
+    <property name="LOGS" value="./" />
 
     <appender name="Console"
         class="ch.qos.logback.core.ConsoleAppender">