Add gitea workflow (#78)

Reviewed-on: #78

.gitea/workflows/deploy.yml

@@ -0,0 +1,25 @@
+name: Backend Deploy
+on:
+  push: [main]
+
+jobs:
+  build:
+    runs-on: standard-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Login
+        with:
+          package_rw: ${{ secrets.PACKAGE_RW }}
+        run: docker login gitea.seeseepuff.be -u seeseemelk -p ${{ secrets.PACKAGE_RW }}
+
+      - name: Build
+        run: |
+          cd backend
+          docker build -t gitea.seeseepuff.be/seeseemelk/wolproxy:$(git rev-parse --short HEAD) .
+
+      - name: Push
+        run: |
+          cd backend
+          docker push gitea.seeseepuff.be/seeseemelk/wolproxy:$(git rev-parse --short HEAD)