Added keystore for production release

Dockerfile

@@ -24,6 +24,7 @@ FROM openjdk:17-jdk-slim-buster AS production
 
 COPY --from=builder /app/build/libs/ /app/
 COPY --from=builder /app/gradle.properties /app/
+COPY --from=builder /app/keystore.jceks /app/
 
 WORKDIR /app