doc: add draft for installation on CENTOS (Docker container)

doc/installation/v1.7/centos.md

+# Installation on CENTOS
+
+For the installation on CENTOS, 
+there is ./install-centos.sh, currently mainly used for installation inside a Docker container.
+Currently, it understands several command line switches:
+
+- --fod_dir DIRNAME : specify FoD run-time directory, where FoD files are to be copied and to be run from 
+- --venv_dir DIRNAME : specify where Python virtualenv used by FoD will be located
+- --base-dir DIRNAME : specify base directory where FoD run-time directory and virtualenv directory will be sub directories
+- --here : do not copy FoD files into a separate FoD run-time directory, but instead install and make to run from current directory (probably not so useful for production)
+
+- --basesw : only install FoD dependencies (OS packages + Python Pip packages in virtualenv directory), do not install and setup FoD run-time directory 
+- --fodproper : skip installing FoD dependencies, only install and setup FoD run-time directory 
+
+
+
+
+

doc/installation/v1.7/debian_ubuntu.md

@@ -3,7 +3,7 @@
 For the installation on recent DEBIAN or UBUNTU, e.g., UBUNTU focal (20.04),
 there is ./install-debian.sh .
 
-It understands several command liane switches:
+It understands several command line switches:
 
 - --fod_dir DIRNAME : specify FoD run-time directory, where FoD files are to be copied and to be run from 
 - --venv_dir DIRNAME : specify where Python virtualenv used by FoD will be located