add document version and forgejo action

.forgejo/workflows/build_release.yml

@@ -0,0 +1,28 @@
+on:
+  push:
+    tags:
+      - "v*"
+
+jobs:
+  upload-release:
+    runs-on: docker
+    steps:
+      - uses: actions/checkout@v3
+      - run: |
+          apt-get update
+          apt-get install -y curl unzip
+          curl -L -o isocpeur.zip http://www.schriftarten-fonts.de/d/11828/isocpeur.zip && unzip isocpeur.zip
+          curl -L https://github.com/typst/typst/releases/download/v0.12.0/typst-x86_64-unknown-linux-musl.tar.xz | tar -xJ
+          chmod +x typst-x86_64-unknown-linux-musl/typst
+      - run: |
+          sed -i "s/version/${GITHUB_REF#refs/tags/}/g" metadata.json
+          ./typst-x86_64-unknown-linux-musl/typst compile --font-path . beitritt.typ
+          mkdir -p dist/release
+          mv beitritt.pdf dist/release
+      - uses: actions/forgejo-release@v2
+        with:
+          direction: upload
+          token: ${{ secrets.TOKEN }}
+          url: https://code.flipdot.org
+          release-dir: dist/release
+          release-notes: "flipdot Beitrittserklärung"