Added Building comments and tools for running without Docker

README.md

@@ -126,3 +126,19 @@ Some notes:
   }
 }
 ```
+
+# Building
+
+Requires Ruby 3.1 or better for support.
+
+On Debian or derivatives this requires `apt-get install ruby-dev` in order to allow eventmachine to work (which is a hard dependency for thin, the webserver we're using for charred.
+
+In order to run in normal use, simply run:
+
+```
+# sudo apt-get install ruby-dev bundler
+# bundler install # on some distros this might be bundler3.1
+# cd src
+# HOST=0.0.0.0 PORT=7878 RACK_ENV=production ruby app.rb
+```
+