Implement CI

.gitea/workflows/ci.yml

@@ -0,0 +1,27 @@
+name: Build and push latest
+run-name: Build and push latest
+on: [push]
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    if: gitea.ref == 'refs/heads/master'
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to registry
+        uses: docker/login-action@v3
+        with:
+          registry: git.skullnet.me
+          username: ${{ secrets.REGISTRY_USERNAME }}
+          password: ${{ secrets.REGISTRY_PASSWORD }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          push: true
+          tags: "git.skullnet.me/erki/ss13_se:latest"
+          file: Dockerfile