jdk

Creation of a docker container providing jdk21.

Creation of a docker container providing jdk11.

This is mirrored to https://gitlab.com/sw4j-net/jdk11

Creation of a docker container providing jdk8.

This is mirrored to https://gitlab.com/sw4j-net/jdk8

Creation of a docker container providing jdk7.

This is mirrored to https://gitlab.com/sw4j-net/jdk7

Creation of a docker container providing jdk10.

This is mirrored to https://gitlab.com/sw4j-net/jdk10