Added more potential details in readme.

README

@@ -1,11 +1,20 @@
 In build upstream bare repo (webserver:/usr/local/src/web/example.com/www/), run:
+	# chown root:srv .
+	# chmod g+ws .
 	# git init --bare --shared=group
 	# git config receive.denyCurrentBranch updateInstead
 	# git config receive.denyNonFastForwards false
-	?(# git config core.sharedRepository true)
+	?(# git config core.sharedRepository true)    # if needed because of missing init option
+
+Set upstream and push branches to new bare repo, then run:
 	# git worktree add /srv/prod/example.com/www master
 	# git worktree add /srv/beta/example.com/www release
 	# git worktree add /srv/dev/example.com/www dev
+
+	# chmod -R g+w .
+	# chmod g+w /srv/*/example.com/www
+
+
 	# chown -R root:srv .
 	# chmod -R g+swX .
 	# chown root:srv /srv/prod/example.com/www