beginnerDockerfile Instructions & Multi-Stage Builds
How would you pass a different JAR file name into the build without editing the Dockerfile?
Declare an ARG with a default, e.g., ARG JAR_FILE=target/*.jar, then reference it in COPY: COPY ${JAR_FILE} app.jar. At build time, override it with docker build --build-arg JAR_FILE=target/myapp-2.0.jar . — useful for CI pipelines that build multiple variants from one Dockerfile.
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How would you pass a different JAR file name into the build without editing the Dockerfile?