fix: copy admin build output to build/

Author: Levi Sørum

Dockerfile

@@ -17,6 +17,7 @@ RUN npm ci --omit=dev
 
 COPY --from=build /app/dist ./dist
 COPY --from=build /app/dist/config ./config
+COPY --from=build /app/dist/build ./build
 COPY ./public ./public
 COPY favicon.png ./