fix(ot): add minified updated OT library and build:ot script

Signed-off-by: Erik Michelson <github@erik.michelson.eu>

docs/content/dev/ot.md

@@ -11,3 +11,10 @@ And even more in this 2010 article series:
 - <https://drive.googleblog.com/2010/09/whats-different-about-new-google-docs_21.html>
 - <https://drive.googleblog.com/2010/09/whats-different-about-new-google-docs_22.html>
 - <https://drive.googleblog.com/2010/09/whats-different-about-new-google-docs.html>
+
+## OT library
+
+HedgeDoc uses a vendored version of OT.js. The source code lives under `public/vendor/ot/`.
+The HedgeDoc frontend uses a minified build `public/vendor/ot/ot.min.js`.
+
+This build is generated by `yarn run build:ot`. This needs to be done after changes to the OT code. 

docs/content/dev/release_checklist.md

@@ -52,6 +52,7 @@ To copy this checklist please go to [this link](https://github.com/hedgedoc/hedg
 mkdir /tmp/hedgedoc && cd /tmp/hedgedoc
 git clone -b master https://github.com/hedgedoc/hedgedoc.git .
 yarn install
+yarn build:ot
 yarn build
 cd ..
 tar cvzf hedgedoc-x.y.z.tar.gz --sort=name --exclude hedgedoc/node_modules --exclude hedgedoc/.git --exclude hedgedoc/.github --exclude hedgedoc/.yarn/cache hedgedoc