Update CI

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

.gitea/workflows/main.yaml

@@ -0,0 +1,58 @@
+name: Build and Release PDF
+
+on:
+  push:
+    branches:
+      - "**"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    outputs:
+      tag: ${{ steps.set-tag.outputs.tag }}
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v3
+
+      - name: Install LaTeX (XeLaTeX)
+        run: |
+          apt-get update
+          apt-get install -y texlive-xetex texlive-science
+
+      - name: Compile PDF
+        run: |
+          xelatex main.tex
+
+      - name: Set tag output
+        id: set-tag
+        run: echo "tag=release-${{ env.GITHUB_SHA }}" >> $GITHUB_OUTPUT
+
+      - name: Upload PDF Artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: main-pdf
+          path: main.pdf
+          retention-days: 1
+
+  release:
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Download PDF Artifact
+        uses: actions/download-artifact@v3
+        with:
+          name: main-pdf
+          path: .
+
+      - name: Create Gitea Release
+        uses: https://gitea.com/actions/release-action@main
+        with:
+          api_key: "${{ secrets.RELEASE_TOKEN }}"
+          tag: ${{ needs.build.outputs.tag }}
+          files: |
+            main.pdf