Changelog of the Docker headless VNC images

start no_vnc with localhost instead of VNC_IP to ensure startup on docker bridge mode (#41)
add xfce4-terminal to enable copy and paste (#55)
add save mode for tag_image.sh script
disable trigger latest Dockerhub build -> use tag_image.sh script
use correct python-numpy packages
add "Known Issues" documentation: Chromium crashes with high VNC_RESOLUTION

disable automatic firefox updates (#45)
fix wrong env usage of $HOME (#47)
fix hanging vnc handshake if container is offline (#50)
Merge pull requestfrom:
- @dmhumph: Update OpenShift instructions for OCP 3.5 or greater (#44)

Centos7: use temporally epel-testing repo to fix chrome error libpng warning: Application built with libpng-1.6.22 but running with 1.5.13 in version 60.0.3112.113-2.el7
Fix broken docker stop/start (#40)

Use fixed firefox version 45.9.0esr (#39, #20, #16)
- fix memory consumption problems in comparison to current firefox 55
- tested on long term container issues without crashes
Add en_US.UTF-8 as default locale (#27)
Add enviroment variable VNC_VIEW_ONLY=true for view only VNC connections (#25)
- Update to tigervnc version 1.8
Use a more stable command for ip determination (PR #31, thx to @arnaudveron)
Support empty CMD values in startup script (#32)
Add chromium flag --disable-gpu to work for current chromium (#36)
Add TERM=xterm environment var (#37)

Add OpenShift support (#3)
- Support for start container process as non-root in usermode (#7)
- Add Labels for OpenShift
Add IceWM as alternative UI
Remove Java installation, not needed in this image (#5)
Refactor build structure (#5)
Fix chromium/chrome startup (#2): Set chromium as default "chrome" and support ~/.chromium-browser.init
Switch from vnc4server to tigervnc (#4)
Remove not needed Screensaver pacakges (#11)
Use Firefox 45 as fixed browser as long current firefox crashes (#16)
Fix issue be starting of reattached containers on docker start (#15)

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