Package - Updates (#124)

* Package - Updates

* CMakeLists - updates

* Docker - Remove UB20.04 support

* Readme - updates

docker/rocJPEG-on-ubuntu20.dockerfile

@@ -1,17 +0,0 @@
-FROM ubuntu:20.04
-
-# install base dependencies
-RUN apt-get update -y
-#RUN apt-get dist-upgrade -y
-RUN DEBIAN_FRONTEND=noninteractive apt-get -y install gcc g++ cmake pkg-config git apt-utils sudo vainfo dialog
-
-# install ROCm
-RUN DEBIAN_FRONTEND=noninteractive apt-get -y install initramfs-tools libnuma-dev wget keyboard-configuration && \
-        wget https://repo.radeon.com/amdgpu-install/6.3/ubuntu/focal/amdgpu-install_6.3.60300-1_all.deb && \
-        sudo apt-get install ./amdgpu-install_6.3.60100-1_all.deb && \
-        sudo amdgpu-install -y --usecase=rocm
-
-WORKDIR /workspace
-
-# install rocJPEG package
-RUN DEBIAN_FRONTEND=noninteractive sudo apt install -y rocjpeg rocjpeg-dev rocjpeg-test