Add some updating instructions in README

README.md

@@ -1,3 +1,35 @@
+# TechInc fork of MediaWiki
+
+To add the upstream repo
+
+```
+git remote add upstream https://gerrit.wikimedia.org/r/mediawiki/core.git
+```
+
+Make sure you track the correct upstream branch for the current release (`REL1_43` at the time of writing, an LTS release).
+
+To rebase our changes on top of the upstream codebase
+```
+git pull upstream --rebase --autostash
+```
+
+Make sure you update the submodules with
+```
+git submodule update --init --recursive
+```
+
+If you change any composer files, run
+```
+composer update
+```
+
+To update the MediaWiki database (*IMPORTANT*: do a backup beforehand!)
+```
+php maintenance/run.php update
+```
+
+
+
 # MediaWiki
 
 MediaWiki is a free and open-source wiki software package written in PHP. It