adds local building instructions, makes config work with it

README.md

@@ -1,2 +1,12 @@
 # ccn-rse
+
 Website for CCN RSE group
+
+## Building locally
+
+- Install Jekyll's [requirements](https://jekyllrb.com/docs/installation/)
+- From the root directory, run `gem install jekyll bundler`, which will install
+  jekyll and the other required packages.
+- From the root directory, run `bundle exec jekyll serve -s ./site -d ./_site
+  --livereload`, then open `localhost:4000/neuroRSE/` in your browser (the
+  trailing slash is required!)

site/_config.yml

@@ -20,7 +20,7 @@
 
 title: NeuroRSE
 description: >- # this means to ignore newlines until "baseurl:"
-baseurl: "neuroRSE/"
+baseurl: "/neuroRSE"
 url: "https://flatironinstitute.github.io" # the base hostname & protocol for your site, e.g. http://example.com
 
 # Build settings