Add docker image with installed pmemkv

[karczex]

FEAT: Add docker image with installed pmemkv

Rationale

Docker image with installed pmemkv and its dependencies, generated after every merge, may (should?) be used as base image for docker based CI in bindings, and pmemkv-bench repositories.

Building such image only for master branch and only for one OS is probably enough.

API Changes

No.

Implementation details

• Build process of docker image should be multistage build, to minimise size of the result image, as build tools (like valgrind) are not needed later.
• First stage of build may be based on pmemkv build image.

[karczex]

Part of build process of such image should be installation of pmdk and pmemkv packages using package manager (apt, dnf) from local package repository

https://linux.die.net/man/8/createrepo
https://gist.github.com/fernandoaleman/1377211