I wrote a project in Java that contains one class called Calculator.java, a test page called CalculatorTest.java and a pom.xml page. I try to run my project on Docker but it gives me the error:

 Unable to access jarfile CalculatorTest.jar

This is my Dockerfile:

FROM maven:3.6.3-jdk-11 AS build
WORKDIR /app
COPY pom.xml .
RUN mvn dependency:go-offline -B
COPY src ./src
RUN mvn clean package -DskipTests

FROM openjdk:11-jre-slim
WORKDIR /app
COPY --from=build /app/target/calulator-shira-1.0-SNAPSHOT.jar app.jar
ENTRYPOINT ["java", "-jar", "CalculatorTest.jar"]