fix dockerfile

Signed-off-by: Peter Siegmund <developer@mars3142.org>

Dockerfile

@@ -1,8 +1,6 @@
 # Stage that builds the application, a prerequisite for the running stage
 FROM eclipse-temurin:21-jdk-noble AS build
 
-ARG SERVICE_ROOT
-
 RUN apt-get update -qq
 
 # Stop running as root at this point
@@ -11,12 +9,10 @@ WORKDIR /usr/src/app/
 RUN chown app:app /usr/src/app/
 USER app
 
-# Copy pom.xml and prefetch dependencies so a repeated build can continue from the next step with existing dependencies
-COPY --chown=app ${SERVICE_ROOT}/.mvn/ .mvn
-COPY --chown=app ${SERVICE_ROOT}/mvnw ${SERVICE_ROOT}/pom.xml ./
-
 # Copy all needed project files to a folder
-COPY --chown=app:app ${SERVICE_ROOT}/src ./src
+COPY --chown=app ./.mvn/ .mvn
+COPY --chown=app ./mvnw ./pom.xml ./
+COPY --chown=app ./src ./src
 
 # Build the production package
 RUN ./mvnw --batch-mode clean verify -DskipTests