Add release workflow (#34)

.github/workflows/main.yml

@@ -0,0 +1,22 @@
+name: Release LaTeX Document
+on:
+  push:
+    tags:
+      - 'v*'
+jobs:
+  build_latex:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Git repository
+        uses: actions/checkout@v3
+      - uses: xu-cheng/texlive-action/full@v1
+        with:
+          run: |
+            apk add make
+            cd book
+            make all
+            make release
+      - name: Release
+        uses: softprops/action-gh-release@v1
+        with:
+          files: book/TheBreadCode-The-Sourdough-Framework.pdf