diff --git a/Dockerfile b/Dockerfile
index 95e815c48..0149ddea4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,15 +1,27 @@
+FROM node:18-alpine as builder
+
+WORKDIR /app
+
+COPY assets ./assets
+COPY node_modules ./node_modules
+COPY build_n_deploy ./build_n_deploy
+COPY node_dist ./node_dist
+COPY frontend_production ./frontend_production
+COPY package.json .
+
 FROM gcr.io/distroless/nodejs:18
 
 WORKDIR /var/server
 
-ADD assets ./assets
-ADD node_modules ./node_modules
-ADD build_n_deploy ./build_n_deploy
-ADD node_dist ./node_dist
-ADD frontend_production ./frontend_production
-ADD package.json .
+COPY --from=builder /app/assets ./assets
+COPY --from=builder /app/node_modules ./node_modules
+COPY --from=builder /app/build_n_deploy ./build_n_deploy
+COPY --from=builder /app/node_dist ./node_dist
+COPY --from=builder /app/frontend_production ./frontend_production
+COPY --from=builder /app/package.json .
 
 ENV NODE_ENV production
 
 EXPOSE 8000
-CMD ["--es-module-specifier-resolution=node", "node_dist/backend/server.js"]
+
+CMD ["--es-module-specifier-resolution=node", "node_dist/backend/server.js"]
\ No newline at end of file
diff --git "a/src/frontend/Komponenter/Behandling/VedtakOgBeregning/Overgangsst\303\270nad/Felles/f\303\270dselsdatoUtils.ts" "b/src/frontend/Komponenter/Behandling/VedtakOgBeregning/Overgangsst\303\270nad/Felles/f\303\270dselsdatoUtils.ts"
index 2441b65c4..9d8bf67fc 100644
--- "a/src/frontend/Komponenter/Behandling/VedtakOgBeregning/Overgangsst\303\270nad/Felles/f\303\270dselsdatoUtils.ts"
+++ "b/src/frontend/Komponenter/Behandling/VedtakOgBeregning/Overgangsst\303\270nad/Felles/f\303\270dselsdatoUtils.ts"
@@ -27,10 +27,12 @@ export const utledYngsteBarnFødselsdatoSomHarInngangsvilkåretAleneomsorgOppfyl
         .map((b) => b?.registergrunnlag.fødselsdato)
         .filter((fødselsdato): fødselsdato is string => !!fødselsdato && erGyldigDato(fødselsdato))
         .concat(terminbarnFødselsdatoer);
+
     if (datoer.length === 0) {
         return undefined;
     }
+
     return datoer.reduce((a, b) => {
         return erEtter(a, b) ? a : b;
-    });
+    }, datoer[0]);
 };