add contributing and fix release yml

Author: OllysCoding

.github/workflows/release.yml

@@ -2,7 +2,7 @@ name: release
 
 on:
   release:
-    - types: [released]
+    types: [published]
 
 jobs:
   docker:

CONTRIBUTING.md

@@ -0,0 +1,12 @@
+## Running / developing locally
+
+### Prerequisites
+
+You _must_ follow the steps for node-canvas outlined here: https://www.npmjs.com/package/canvas.
+
+### Project structure
+
+This repo uses npm workspaces and is split into two main top level folders:
+
+- `./apps` - Contains the two 'applications', `frontend` and `backend`.
+- `./packages` - Contains all of the packages which can be used by both applications.