add test build script

.gitea/workflows/test-build.yaml

@@ -0,0 +1,24 @@
+name: Build a docker image for node-jellyfin-role-bot
+run-name: ${{ gitea.actor }} is building an image
+on: 
+  push:
+env:
+  REGISTRY: gitea.brudi.xyz
+  IMAGE_NAME: ${{ gitea.repository }}
+  USER: ${{ gitea.actor }}
+jobs:
+  build-docker-image:
+    runs-on: ubuntu-latest
+    container: catthehacker/ubuntu:act-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+      - name: Log in to the Container registry
+        run: docker login -u ${{ env.USER }} -p ${{ secrets.TOKEN }} ${{ env.REGISTRY }}
+      - name: Build Container
+        run: docker build -t "${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.VERSION }}" .
+        env:
+          version: "${{ cat package.json | grep version | head -1 | awk -F: '{ print $2 }' | sed 's/[\",]//g' }}"