Update README and add gitea workflow

.gitea/workflows/build-on-release.yaml

@@ -1,13 +1,22 @@
 name: Build on Release
 run-name: ${{ gitea.actor }}
-on: [ release ]
+on:
+  push:
+    branches:
+      - main
 
 jobs:
   cargo-build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-latest-rust
     steps:
       - name: Check out code repository
-        uses: actions/checkout@v4
-      - name: Is cargo installed?
+        uses: https://gitea.com/actions/checkout@v4
+      - name: Build Binary
         run: |
-          which cargo
+          cargo build --release
+      - name: Push binary to artifact
+        uses: https://gitea.com/actions/gitea-release-action@v1
+        with:
+          draft: true
+          files: |-
+            target/release/rust-archlinux-update