chore(builds): setup build system

.github/CODEOWNERS

@@ -0,0 +1 @@
+* @mozillasocial/web

.github/workflows/ci.yml

@@ -1,15 +1,12 @@
-name: ci
+name: CI Build Checks
 
 permissions: {}
 
 on:
  push:
- branches:
- - main
+ branches: ["main"]
  pull_request:
- branches:
- - main
- workflow_dispatch: {}
+ types: [opened, synchronize]
 
 jobs:
  ci:
@@ -37,3 +34,24 @@ jobs:
 
  - name: 💪 Type check
  run: pnpm test:typecheck
+
+ docker-build:
+ name: Build Docker Image
+ timeout-minutes: 15
+ runs-on: ubuntu-latest
+ steps:
+ - name: Check out code
+ uses: actions/checkout@v3
+ with:
+ fetch-depth: 2
+ - name: Set up QEMU
+ uses: docker/setup-qemu-action@v3
+ - name: Set up Docker Buildx
+ uses: docker/setup-buildx-action@v3
+ - name: Build and export to Docker
+ uses: docker/build-push-action@v5
+ with:
+ context: .
+ load: true
+ cache-from: type=gha
+ cache-to: type=gha,mode=max