Revert "bruk distroless image (#46)"

This reverts commit 72d9098.

Author: rannveigskjerve

Dockerfile

@@ -1,6 +1,5 @@
-FROM gcr.io/distroless/java21-debian12
+FROM ghcr.io/navikt/baseimages/temurin:21
+
 ENV JAVA_OPTS='-XX:MaxRAMPercentage=75'
+
 COPY build/libs/*.jar ./
-ENV TZ="Europe/Oslo"
-EXPOSE 8080
-CMD ["app.jar"]