Add ci/cd image builder (#172)

* add ci/cd image builder

* disable cache

* try this

* don't compile from scratch

* fix missing curl

* clean up

.github/workflows/build-runner.yml

@@ -0,0 +1,52 @@
+name: Build CI/CD base image
+
+on:
+  # schedule:
+  #   - cron: '15 11 * * *'
+  push:
+    branches: [ "main" ]
+    paths:
+      - ".github/workflows/runner.Dockerfile"
+  pull_request:
+    branches: [ "main" ]
+    paths:
+      - ".github/workflows/runner.Dockerfile"
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: cicd-runner-base
+
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Log into registry ${{ env.REGISTRY }}
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@343f7c4344506bcbf9b4de18042ae17996df046d # v3.0.0
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@96383f45573cb7f253c731d3b3ab81c87ef81934 # v5.0.0
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      - name: Build and push Docker image
+        id: build-and-push
+        uses: docker/build-push-action@0565240e2d4ab88bba5387d719585280857ece09 # v5.0.0
+        with:
+          file: .github/workflows/runner.Dockerfile
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

.github/workflows/runner.Dockerfile

@@ -0,0 +1,7 @@
+FROM rust:1.56-slim
+
+# Alternative approach:
+# RUN cargo install wasm-pack
+
+RUN apt-get update && apt-get install curl -y
+RUN curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh