chore: Add dockerfile for deployment (#180)

This just adds a very simple dockerfile for deploying `coderd` (and later `provisionerd`). 

This adds a `deploy` directory at the root, and a `make docker/build` command to the makefile.

Thanks @jawnsy for the all the help 😄

.github/workflows/coder.yaml

@@ -88,14 +88,9 @@ jobs:
       - run: "make --output-sync -j gen"
       - run: ./scripts/check_unstaged.sh
 
-  style:
-    name: "style/${{ matrix.style }}"
+  style-fmt:
+    name: "style/fmt"
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        style:
-          - fmt
-      fail-fast: false
     steps:
       - name: Checkout
         uses: actions/checkout@v2
@@ -116,8 +111,8 @@ jobs:
         run: yarn install
         working-directory: site
 
-      - name: "make ${{ matrix.style }}"
-        run: "make --output-sync -j ${{ matrix.style }}"
+      - name: "make fmt"
+        run: "make --output-sync -j fmt"
 
   test-go:
     name: "test/go"
@@ -189,6 +184,43 @@ jobs:
           flags: unittest-go-${{ matrix.os }}
           fail_ci_if_error: true
 
+  deploy:
+    name: "deploy"
+    runs-on: ubuntu-latest
+    #if: github.event_name == 'pull_request'
+    permissions:
+      contents: read
+      id-token: write
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Authenticate to Google Cloud
+        uses: google-github-actions/auth@v0
+        with:
+          workload_identity_provider: projects/477254869654/locations/global/workloadIdentityPools/github/providers/github
+          service_account: github@coder-ci.iam.gserviceaccount.com
+
+      - name: Set up Google Cloud SDK
+        uses: google-github-actions/setup-gcloud@v0
+
+      - name: Configure Docker for Google Artifact Registry
+        run: gcloud auth configure-docker us-docker.pkg.dev
+
+      - uses: actions/setup-node@v2
+        with:
+          node-version: "14"
+
+      - run: yarn install
+        working-directory: site
+
+      - uses: actions/setup-go@v2
+        with:
+          go-version: "^1.17"
+
+      - run: make docker/image/coder
+
+      - run: docker push us-docker.pkg.dev/coder-blacktriangle-dev/ci/coder:latest
+
   test-js:
     name: "test/js"
     runs-on: ubuntu-latest