[keycloak-user] Setting web context path and adding providers in Dockerfile

I'm struggling with extending keycloak's docker image, so that I could change the default web-context "/auth" path in /opt/jboss/keycloak/standalone/configuration/standalone.xml and /opt/jboss/keycloak/domain/configuration/domain.xml files. I tried to use jboss-cli.sh to accomplish it, but the following Dockerfile: FROM jboss/keycloak:7.0.0 COPY startup-config.cli /opt/jboss/tools/cli/startup-config.cli RUN /opt/jboss/keycloak/bin/jboss-cli.sh --file="/opt/jboss/tools/cli/startup-config.cli" ENV KEYCLOAK_USER=admin ENV KEYCLOAK_PASSWORD=admin startup-config.cli: /subsystem=keycloak-server:write-attribute(name=web-context,value=keycloak/auth) build command ends with "No connection to the controller." I also would like to add some custom providers to the <providers> section of standalone.xml file: <providers> ... <provider>module:x.y.z.some-custom-provider</provider> </providers> Is it possible to edit that xml files using custom Dockerfile and extending default keycloak image? I will be extremally grateful for help. Best regards, Sebastian