I try follow the documentantion but the link is broken https://gluu.org/docs/ce/4.2/installation-guide/install-docker/ https://www.gluu.org/docs/oxd/ How can I procced ? I am trying to download the project from https://github.com/GluuFederation/oxd and create from docker file on folder /oxd-server but shows a error on build Sending build context to Docker daemon 1.31MB Step 1/8 : FROM openjdk:8-jre ---> 4c45f8d078ff Step 2/8 : LABEL maintainer="Michal Kepkowski" ---> Using cache ---> 6666defb3a84 Step 3/8 : COPY target/oxd-server.jar /oxd-server.jar COPY failed: file not found in build context or excluded by .dockerignore: stat target/oxd-server.jar: file does not exist