Put it in a docker

.gitignore

@@ -1,2 +1,3 @@
 _site
-
+.idea
+vendor

README.md

@@ -10,6 +10,17 @@ You can run the site on your computer as if it were live online using Jekyll. Yo
 
     git clone git@git.coop:cotech/website.git
     
+### ... using docker
+
+Make sure you have [docker](https://docs.docker.com/install/) (CE is fine) installed and running, then:
+
+    cd website
+    ./dev
+    
+And visit [localhost:4000](http://localhost:4000) to view the site.
+
+### ... directly on your machine
+
 Install the dependencies for the project
 
     cd website

_config.yml

@@ -1,7 +1,10 @@
 ---
 title: Cotech Website
 timezone: UTC
-exclude: ['scripts']
+exclude:
+- scripts
+- vendor
+- .idea
 collections:
   clients:
     title: Clients

dev

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+set -eu
+
+docker run --rm -it \
+  -v $(pwd):/src \
+  -p 4000:4000 \
+  ruby:2.5.3 sh -c '
+    cd /src &&
+    bundle --path vendor &&
+    bundle exec jekyll serve --host 0.0.0.0 --port 4000
+  '