added build automation

.gitea/workflows/build.yml

@@ -0,0 +1,30 @@
+name: Build docker container
+
+on:
+  push:
+    branches: main
+  workflow_dispatch:
+
+concurrency:
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      -
+        name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          registry: git.jonb.io
+          username: ${{ gitea.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      -
+        name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          push: true
+          tags: jblu/jonbio:latest