Multistage Dockerfile
Traditional Method
FROM amazonlinux:latest
RUN yum update && yum install java-17 unzip -y
copy tomcat /tomcat/.
RUN chmod +x /opt/apache-tomcat-9.0.98/bin/catalina.sh
EXPOSE 8080
COPY studentui studentui/.
WORKDIR /studentui
RUN mvn clean package
RUN mv target/*.war /tomcat/webapps/student.war
CMD ["/tomcat/bin/catalina.sh", "run"]
Multistage Method
FROM maven:3.9.9-amazoncorretto-8-debian-bookworm AS builder
COPY student-ui /.
RUN mvn clean package # build in target/*.war
FROM tomcat:jre8:alpine
COPY --from=builder /target/*.war webapps/student.war