Fix Docker image build

Author: joschi

Dockerfile

@@ -1,10 +1,10 @@
-FROM openjdk:8-jdk-alpine AS build
+FROM openjdk:8-jdk-slim AS build
 WORKDIR /build
 COPY ./ /build
 RUN ./mvnw -V -B -ff -P docker package -q
 
-FROM openjdk:8-jre-alpine
+FROM openjdk:8-jre-slim
 WORKDIR /app
-COPY --from=build /build/cli/target/openapi-diff-jar-with-dependencies.jar /app/openapi-diff.jar
+COPY --from=build /build/cli/target/openapi-diff-cli-*-all.jar /app/openapi-diff.jar
 ENTRYPOINT ["java", "-jar", "/app/openapi-diff.jar"]
 CMD ["--help"]