feat: add block-proxy service and nb-blocks-proxy package

Author: andrewklau

.github/workflows/block-proxy-build.yaml

@@ -0,0 +1,30 @@
+name: Build Block Proxy
+on:
+  push:
+    branches: ['main', 'docker/block-proxy']
+    paths:
+      - 'apps/block-proxy/**'
+      - '.github/workflows/block-proxy-build.yaml'
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: docker/setup-buildx-action@v3
+      - uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: apps/block-proxy/Dockerfile
+          platforms: linux/amd64
+          push: true
+          provenance: false
+          tags: |
+            ghcr.io/nearblocks/block-proxy:latest
+            ghcr.io/nearblocks/block-proxy:${{ github.sha }}
+          cache-from: type=registry,ref=ghcr.io/nearblocks/block-proxy:latest
+          cache-to: type=inline