FROM maven:3.6.0-jdk-11-slim as builder WORKDIR /app COPY . . RUN mvn -f /app/keycloak-theme/pom.xml install FROM quay.io/keycloak/keycloak:16.1.0 COPY --from=builder /app/keycloak-theme/target/classes /opt/jboss/keycloak/themes/keycloak.v2 EXPOSE 8080