Test docker actions #20, trying to fix error

Dockerfile

@@ -2,22 +2,21 @@ FROM gradle:latest AS build
 
 WORKDIR /app
 
-COPY build.gradle .
-COPY settings.gradle .
-COPY gradle ./gradle/
-
-COPY src ./src/
+COPY lib/build.gradle /app/
+COPY lib/settings.gradle /app/
+COPY lib/gradle /app/gradle/
+COPY lib/src /app/src/
 
 RUN gradle wrapper
 RUN chmod +x gradlew
-RUN ./gradlew lib:build
+RUN ./gradlew build
 
 FROM openjdk:latest
 
 WORKDIR /app
 
-COPY --from=build /app/build/libs/*.jar app.jar
+COPY --from=build /app/lib/build/libs/*.jar app.jar
 
 EXPOSE 8080
 
-CMD ["java", "-jar", "app.jar"]
+CMD ["java", "-jar", "app.jar"]