Add some basic CI to the tutorial

.github/workflows/build.yml

@@ -1,10 +1,10 @@
 on:
   pull_request:
     branches:
-      - main
+      - dex-tutorial
   push:
     branches:
-      - main
+      - dex-tutorial
 
 name: Continuous integration
 

.github/workflows/docker.yml

@@ -1,14 +1,11 @@
 # Workflow inspired by https://docs.github.com/en/actions/publishing-packages/publishing-docker-images
 
-# I'm choosing to publish on github container registry as opposed to docker hub for two reasons
-# 1. It feels less official and these containers are not yet ready for production
-# 2. It doesn't require setting up a docker hub account or encrypting secrets.
-
 name: Create and publish a Docker image
 
 on:
   push:
     branches:
+      # TODO consider enabling for dex tutorial solution
       - main
     tags:
       - '**'
@@ -48,35 +45,3 @@ jobs:
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-
-  build-and-push-wallet-image:
-    runs-on: ubuntu-latest
-    permissions:
-      contents: read
-      packages: write
-
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v3
-
-      - name: Log in to the Container registry
-        uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
-        with:
-          registry: ${{ env.REGISTRY }}
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Extract metadata (tags, labels) for Docker
-        id: meta
-        uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
-        with:
-          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}-wallet
-
-      - name: Build and push Docker image
-        uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
-        with:
-          file: ./wallet/Dockerfile
-          context: .
-          push: true
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}

.github/workflows/links.yml

@@ -1,6 +1,12 @@
 name: Check Markdown Links
 
-on: [push]
+on:
+  pull_request:
+    branches:
+      - dex-tutorial
+  push:
+    branches:
+      - dex-tutorial
 
 jobs:
   markdown-link-check:

Dockerfile

@@ -14,7 +14,7 @@ RUN cargo build --locked --release
 # Alpine does't work as explained https://stackoverflow.com/a/66974607/4184410
 # Also, surprisingly, `ubuntu:latest` doesn't work and leads to "OS can't spawn worker thread: Operation not permitted"
 FROM docker.io/library/ubuntu:20.04
-LABEL description="Tuxedo Node Template"
+LABEL description="Tuxedo Order Book Dex Tutorial"
 
 COPY --from=builder /node-template/target/release/node-template /usr/local/bin