chore(docs): Update contributing guidelines

Author: AntJanus

CONTRIBUTING.md

@@ -1,5 +1,26 @@
 # Contributing to ng-redux
 
+## Developing ng-redux
+
+To run the project, simply `npm install`. Then, run tests via `npm run test` or build the entire project via `npm build`.
+
+## Commit convention
+
+ng-redux uses [`standard-version` convention](https://github.com/conventional-changelog/standard-version) which basically looks like this:
+
+```bash
+typeOfCommit(locationOfChanges): Commit message
+```
+
+Examples:
+
+```bash
+fix(lib): Fix ng-redux library issue
+feat(build): Build system test watch
+```
+
+And so on. The commits are then compiled into the changelog along with each release.
+
 ## Release process
 
 For any contributors with release rights: