prepare develop branch

.github/workflows/changelog-check.yml

@@ -4,6 +4,7 @@ on:
     types: [assigned, opened, synchronize, reopened, labeled, unlabeled]
     branches:
       - main
+      - develop
 jobs:
   build:
     name: Check Actions

.github/workflows/codeql-analysis.yml

@@ -13,10 +13,10 @@ name: "CodeQL"
 
 on:
   push:
-    branches: [ main ]
+    branches: [ main, develop ]
   pull_request:
     # The branches below must be a subset of the branches above
-    branches: [ main ]
+    branches: [ main, develop ]
   schedule:
     - cron: '27 22 * * 1'
 

CONTRIBUTING.md

@@ -19,6 +19,9 @@ Before submitting your contribution, please make sure to take a moment and read
 
 - The `main` branch is what is currently deployed to the website. All development should be done in dedicated branches.
 
+- The `develop` branch contains the changes that will be deployed to main next. In order to prepare a release, development
+  branches should have their Pull Request against `develop` and only releases should be merged from `develop` into `main`. 
+
 - Work in the `src` folder and **DO NOT** checkin `dist` in the commits.
 
 - It's OK to have multiple small commits as you work on the PR - GitHub will automatically squash it before merging.
@@ -31,6 +34,9 @@ Before submitting your contribution, please make sure to take a moment and read
   - If you are resolving a special issue, add `(fix #xxxx[,#xxxx])` (#xxxx is the issue id) in your PR title for a better release log, e.g. `update entities encoding/decoding (fix #3899)`.
   - Provide a detailed description of the bug in the PR. Live demo preferred.
   
+- You'll need to update the `CHANGELOG.md` with a description of your changes before you open a pull request and your code
+  should pass the lint check.
+
 ## Development Setup
 
 You will need [Node.js](http://nodejs.org) **version 8+** and a Chrome browser.