chore: add gh action for dev container builds

.devcontainer/devcontainer.json

@@ -37,5 +37,5 @@
     "streetsidesoftware.code-spell-checker",
     "vadimcn.vscode-lldb"
   ],
-  "postCreateCommand": "deno task star"
+  "postCreateCommand": "deno task codegen && deno task star"
 }

.github/workflows/dev-container.yml

@@ -0,0 +1,13 @@
+name: Dev Container Builds
+on:
+  - pull_request
+  - push
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout (GitHub)
+        uses: actions/checkout@v2
+
+      - name: Build and run Dev Container task
+        uses: devcontainers/[email protected]

Dockerfile

@@ -1,8 +1,8 @@
-ARG DENO_VERSION=1.25.2
+ARG DENO_VERSION=1.29.1
 
 FROM denoland/deno:${DENO_VERSION} as vscode
 
-ARG POLKADOT_VERSION=v0.9.25
+ARG POLKADOT_VERSION=v0.9.31
 
 RUN export DEBIAN_FRONTEND=noninteractive \
   && apt-get update \