GIT: add .gitignore

precompiled/docker.md

@@ -3,7 +3,12 @@
 [![home](/icons/home.svg "wiki home")](/home)
 [![packages](/icons/package.svg "packages")](/precompiled)
 
-_Precompiled packages (Docker)_
+_Precompiled packages (Docker)_ <br>
+***Quick-start***: <br>
+If docker is already installed and setup, simply download the
+[_openfoam-docker_][run-script] and run it.
+
+----
 
 [[_TOC_]]