set up forgejo ci baseline

.forgejo/workflows/ci.yml

@@ -0,0 +1,45 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ci-${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  validate:
+    name: Validate
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - name: Checkout repository
+        uses: https://data.forgejo.org/actions/checkout@v4
+
+      - name: Install Bun
+        run: |
+          set -euo pipefail
+          apt-get update
+          apt-get install --yes --no-install-recommends curl unzip
+          rm -rf /var/lib/apt/lists/*
+          curl -fsSL https://bun.sh/install | bash
+          ~/.bun/bin/bun --version
+
+      - name: Install dependencies
+        run: ~/.bun/bin/bun install --frozen-lockfile
+
+      - name: Run tests
+        run: ~/.bun/bin/bun test
+
+      - name: Check Docker workspace snapshot
+        run: ~/.bun/bin/bun run check:docker-workspace
+
+      - name: Build web app
+        run: ~/.bun/bin/bun --cwd=apps/web run build