More typo fixes in installation guide

Fixed typo when referencing directory, custom_installation/ -> custom-installation/

Fixed loop  that occured when two bridges joined together and the switch, forming a loop that would take all the CPU usage from process systemd-networkd

deployments: updated version number of the image. \n As of now the latest version in dockerhub is 2.1, which doesn't work with the deployment specified in 2.0

general: added bridge interfaces between switches and pods. \n This is with the objective  of easing and automating the installation of l2sm, without having the user to configure the ip addresses in their machine

Change to pod instead of deployment

Change to pod instead of deployment

Change the root of the commands

Switch specification added for clarity during installation

Switch specification added for clarity during installation

bug fixes

BUG FIX: switch ip now is saved correctly in the database, using a better trigger for the ip assigning event

Release 2.0