fix pre release script

.github/workflows/test.yml

@@ -29,11 +29,13 @@ jobs:
                   badge-threshold-green: 90
                   badge-threshold-orange: 80
             - name: Generate Changelog
-              run: git log --oneline $(git describe --tags --abbrev=0)..HEAD >> CHANGELOG.txt
               if: ${{ startsWith(github.ref, 'refs/tags/') }}
-            - name: Release
+              run: |
+                  echo "# What's new ?" > CHANGELOG.md
+                  git log --pretty='- %h %s by %aN' --no-merges $(git describe --tags --abbrev=0 @^)..@ >> CHANGELOG.md
+            - name: Pre Release
               uses: softprops/action-gh-release@v1
               if: ${{ startsWith(github.ref, 'refs/tags/') }}
               with:
-                  body_path: CHANGELOG.txt
+                  body_path: CHANGELOG.md
                   draft: true

.gitignore

@@ -3,4 +3,5 @@ index.html
 build
 node_modules
 .parcel-cache
-coverage
+coverage
+CHANGELOG.md

README.md

@@ -1,4 +1,6 @@
 # MJML Bar Chart
+[![Workflow](https://img.shields.io/github/actions/workflow/status/Freezystem/mjml-bar-chart/test.yml?logo=github)](https://github.com/Freezystem/mjml-bar-chart/actions/workflows/test.yml?query=branch%3Amain)
+![Coverage](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/wiki/Freezystem/mjml-bar-chart/coverage-diff-badge.json&logo=jest)
 
 ## Getting started