add a dockerfile and github workflow to build it

.github/workflows/build-and-push.yml

@@ -0,0 +1,88 @@
+name: Build and push image from ref
+
+on:
+  workflow_call:
+    inputs:
+      ref:
+        description: "A ref from this repository, CirclesUBI/pathfinder2"
+        required: true
+        type: string
+      image:
+        description: "The desired name of the image to build"
+        default: 'pathfinder2'
+        required: false
+        type: string
+  workflow_dispatch:
+    inputs:
+      ref:
+        description: "A ref from this repository, CirclesUBI/pathfinder2"
+        required: true
+        type: string
+      image:
+        description: "The desired name of the image to build"
+        default: 'pathfinder2'
+        required: false
+        type: string
+
+jobs:
+
+  build-and-push-image:
+
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      id-token: write
+
+    steps:
+
+    -
+      name: Checkout repository
+      uses: actions/checkout@v3
+      with:
+        ref: ${{ inputs.ref }}
+
+    -
+      name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v2
+
+    -
+      name: Docker meta
+      id: meta
+      uses: docker/metadata-action@v4
+      with:
+        images: |
+          ${{ vars.GC_REGISTRY }}/${{ vars.GC_PROJECT_ID }}/${{ inputs.image }}
+        labels: |
+          org.opencontainers.image.title=${{ inputs.image }}
+          org.opencontainers.image.vendor=CirclesUBI
+        tags: |
+          type=raw,value=latest,enable={{is_default_branch}}
+          type=semver,pattern={{version}}
+          {{ tag }}
+          {{ base_ref }}
+          {{ branch }}
+          type=sha,prefix={{branch}}-
+          {{ sha }}
+
+    -
+      name: Authenticate to Google Cloud
+      id: auth
+      uses: google-github-actions/auth@v1
+      with:
+        workload_identity_provider: "${{ vars.GC_WLI_PROVIDER }}"
+        service_account:            "${{ vars.GC_WLI_SA }}"
+        token_format:               'access_token'
+
+    -
+      name: Login to Container Registry
+      uses: docker/login-action@v2
+      with:
+        registry: ${{ vars.GC_REGISTRY }}
+        username: 'oauth2accesstoken'
+        password: '${{ steps.auth.outputs.access_token }}'
+
+    - name: Build and push Docker image
+      uses: docker/build-push-action@v3
+      with:
+        push: true
+        tags: ${{ steps.meta.outputs.tags }}

.github/workflows/dev.yml

@@ -0,0 +1,17 @@
+name: Build and push the dev image
+
+on:
+  push:
+    branches: [ feature/dockerfile ]
+
+jobs:
+  call-build-and-push:
+    name: Trigger container build and push
+    permissions:
+      contents: read
+      id-token: write
+    uses: ./.github/workflows/build-and-push.yml
+    with:
+      ref: "${{ github.ref }}"
+      image: "pathfinder2"
+    secrets: inherit

Dockerfile

@@ -0,0 +1,15 @@
+FROM rust:latest AS build
+
+WORKDIR /build
+COPY . .
+
+RUN cargo install --path .
+RUN cargo build --release
+
+FROM rust AS app
+
+WORKDIR /app
+COPY --from=build /build/target/release .
+RUN chmod +x ./server
+
+ENTRYPOINT ["./server"]