Update Docker and Docs GitHub workflows

Bump docker/build-push-action to v6 and update file/context in build-docker.yml. Add job name 'Offline Local Version' to build-docs.yml for clarity.

.github/workflows/build-docker.yml

@@ -38,10 +38,10 @@ jobs:
 
       - name: Build and push
         id: docker_build
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
-          file: ${{ github.workspace }}/utils/docker/images/chain-node/Dockerfile
-          context: ${{ github.workspace }}
+          file: utils/docker/images/chain-node
+          context: {{defaultContext}}:${{ github.workspace }}
           push: true
           tags: lthn/chain:${{ inputs.chain-network == 'testnet' && 'testnet' || 'latest' }}
 

.github/workflows/build-docs.yml

@@ -6,6 +6,7 @@ on:
 
 jobs:
   deploy:
+    name: Offline Local Version
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4