added dia to image to allow dia rendering

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

Dockerfile

@@ -8,6 +8,10 @@ WORKDIR /home/svelte/Umbrella/frontend
 RUN npm install && npm run build
 
 
+FROM alpine:3.17 AS dia_source
+RUN apk add dia
+
+
 FROM alpine:3.22 AS java_build
 RUN apk add gradle
 ADD . /Umbrella
@@ -18,7 +22,10 @@ RUN gradle --no-daemon build
 
 FROM alpine
 RUN apk --no-cache add bash fontconfig font-opensans graphviz openjdk21-jre tzdata weasyprint \
+                       libxml2 cairo pango dbus-libs gmp nettle libxi tiff libjpeg-turbo xz-libs glib graphite2 gdk-pixbuf gtk+2.0 \
  && adduser -D umbrella
+COPY --from=dia_source /usr/bin/dia /usr/bin/dia
+COPY --from=dia_source /usr/lib/dia/ /usr/lib/dia/
 WORKDIR /home/umbrella
 
 EXPOSE 80
@@ -31,4 +38,4 @@ RUN mkdir .config \
  && chmod a+rx plantuml.jar \
  && chown -R umbrella . \
  && ln -s /usr/share/zoneinfo/Europe/Berlin /etc/localtime
-USER umbrella
+USER umbrella