Merge 'actions' branch - update docker container and move to Gitea Actions

.github/workflows/build.yml

@@ -0,0 +1,21 @@
+name: OSCW Runner Container Build
+run-name: ${{ github.actor }} running Gitea Actions
+on: [push]
+
+jobs:
+  OSCW-Runner-Container:
+    runs-on: oscw
+    container:
+      image: codingworkshop/oscw-runner:latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+      - name: Build container
+        env:
+          OSCW_DOCKERHUB_USERNAME: ${{ secrets.OSCW_DOCKERHUB_USERNAME }}
+          OSCW_DOCKERHUB_PASSWORD: ${{ secrets.OSCW_DOCKERHUB_PASSWORD }}
+        run: |
+          echo "$OSCW_DOCKERHUB_PASSWORD" | docker login -u $OSCW_DOCKERHUB_USERNAME --password-stdin
+          docker build -t codingworkshop/oscw-runner:latest .
+          docker push codingworkshop/oscw-runner:latest
+          docker image prune -af