chore: bruker et image med m4 support

Dockerfile

@@ -1,18 +1,9 @@
-FROM gcr.io/distroless/java21-debian12:nonroot
+FROM ghcr.io/navikt/fp-baseimages/distroless:21
 
 LABEL org.opencontainers.image.source=https://github.com/navikt/ft-inntektsmelding
-# Healtcheck lokalt/test
-COPY --from=busybox:stable-musl /bin/wget /usr/bin/wget
-
-# Working dir for RUN, CMD, ENTRYPOINT, COPY and ADD (required because of nonroot user cannot run commands in root)
-WORKDIR /app
 
 COPY target/classes/logback*.xml conf/
 COPY target/lib/*.jar lib/
 COPY target/app.jar .
 
-ENV TZ=Europe/Oslo
-ENV JAVA_OPTS="-Djava.security.egd=file:/dev/urandom \
-    -Dlogback.configurationFile=conf/logback.xml"
-
 CMD ["app.jar"]