♻️ Refactor the build CI

Author: phaelfp

.github/workflows/build.yml

@@ -1,13 +1,26 @@
 name: Build EPub
 
-on: push
+on:
+  push:
+    branches:
+      - main
 
 jobs:
   convert_via_pandoc:
     runs-on: ubuntu-18.04
     steps:
       - uses: actions/checkout@v2
-      - uses: docker://pandoc/core:2.9
+
+      - name: Compute tag name
+        id: compute-tag
+        run: |
+          echo Computing next tag number
+          LASTPATCH=$(git describe --tags | cut -d- -f1 | cut -d. -f3)
+          PATCH=$(($LASTPATCH+1))
+          echo "::set-output name=tagname::1.0.${PATCH}"
+
+      - name: Build release assets
+        uses: docker://pandoc/core:2.9
         with:
           args: >- # allows you to break string into multiple lines
             --standalone
@@ -28,3 +41,14 @@ jobs:
             modulo-01/modulo-01-exercicio-06.md
             modulo-01/modulo-01-exercicio-07.md
             modulo-01/modulo-01-extra-01.md
+
+      - name: List files
+        run: ls -las
+
+      - name: Create release
+        uses: ncipollo/release-action@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          tag: ${{ steps.compute-tag.outputs.tagname }}
+          commit: main
+          artifacts: './react.epub'