Added workflow for docker build

.gitea/workflows/dockerbuild.yaml

@@ -0,0 +1,24 @@
+
+name: dockerbuild
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  dockerbuild:
+    name: Build docker image
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: dev.noccylabs.info/noccylabs/alpine-php83-aio:latest