fixed missing permissions for setting localtime

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

Dockerfile

@@ -1,7 +1,7 @@
 FROM alpine:3.22 AS svelte_build
 RUN apk add npm
 RUN adduser -Dh /home/svelte svelte
-ADD frontend /home/svelte/Umbrella/frontend
+ADD . /home/svelte/Umbrella
 RUN chown -R svelte /home/svelte/Umbrella
 USER svelte
 WORKDIR /home/svelte/Umbrella/frontend
@@ -17,18 +17,14 @@ RUN gradle --no-daemon build
 
 
 FROM alpine
-RUN apk --no-cache add bash fontconfig font-opensans graphviz openjdk21-jre weasyprint \
+RUN apk add bash fontconfig font-opensans graphviz openjdk21-jre tzdata weasyprint
- && adduser -D umbrella
+RUN adduser -D umbrella
+COPY --from=java_build /Umbrella/backend/build/libs/backend.jar /home/umbrella/jar/
+RUN chown -R umbrella /home/umbrella
+ADD https://github.com/plantuml/plantuml/releases/download/v1.2025.10/plantuml-1.2025.10.jar /home/umbrella/plantuml.jar
 WORKDIR /home/umbrella
-
+RUN chmod a+rx plantuml.jar && ln -s /usr/share/zoneinfo/Europe/Berlin /etc/localtime
+USER umbrella
+RUN mkdir .config && ln -s /host/config.json .config/Umbrella.json
 EXPOSE 80
 CMD java -jar jar/backend.jar
-
-ADD https://github.com/plantuml/plantuml/releases/download/v1.2025.10/plantuml-1.2025.10.jar /home/umbrella/plantuml.jar
-COPY --from=java_build /Umbrella/backend/build/libs/backend.jar /home/umbrella/jar/
-RUN mkdir .config \
- && ln -s /host/config.json .config/Umbrella.json \
- && chmod a+rx plantuml.jar \
- && chown -R umbrella . \
- && ln -s /usr/share/zoneinfo/Europe/Berlin /etc/localtime
-USER umbrella