Unable to locate package oracle-java8-installer

General
1

Hey, I don’t understand what the error might be.

Anyone that can help me?

Dockerfile

FROM ubuntu:14.04

    ADD ./lib/apt/sources.list /etc/apt/sources.list
    RUN apt-get update -y; apt-get upgrade -y
    RUN apt-get install -y software-properties-common
    RUN add-apt-repository ppa:webupd8team/java -y
    RUN apt-get update -y; apt-get upgrade -y
    RUN echo oracle-java8-installer shared/accepted-oracle-license-v1-1 select true | sudo /usr/bin/debconf-set-selections
    RUN apt-get install -y curl oracle-java8-installer oracle-java8-set-default supervisor pwgen
    RUN apt-get update && apt-get install -y wget git && apt-get clean all

error

E: Unable to locate package oracle-java8-installer
        E: Unable to locate package oracle-java8-set-default
        The command '/bin/sh -c apt-get install -y curl oracle-java8-installer oracle-java8-set-default supervisor pwgen' returned a non-zero code: 100