Initial commit

.github/workflows/docker-publish.yml

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+name: Build and publish Docker image
+
+# Builds SaraView's image (Dockerfile at the repo root) and pushes it to
+# GitHub Container Registry (ghcr.io) so it can be pulled directly on
+# ZimaOS instead of building locally every time.
+#
+# Runs on every push to main (tagged "latest" + the short commit SHA) and
+# on version tags like v1.0.0 (tagged with that version). Also runnable
+# by hand from the Actions tab ("workflow_dispatch").
+#
+# One manual, one-time step after this first runs: GHCR packages built via
+# a workflow's built-in token default to PRIVATE, even on a public repo.
+# Go to your GitHub profile -> Packages -> saraview -> Package settings ->
+# Change visibility -> Public, or ZimaOS won't be able to pull it without
+# a login.
+
+on:
+  push:
+    branches: ["main"]
+    tags: ["v*.*.*"]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  packages: write
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Compute lowercase image name
+        # GHCR requires an all-lowercase image path even though GitHub
+        # usernames/repos themselves are case-insensitive (e.g. SRHTNIN
+        # becomes srhtnin here).
+        run: echo "IMAGE=ghcr.io/$(echo '${{ github.repository }}' | tr '[:upper:]' '[:lower:]')" >> "$GITHUB_ENV"
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Compute tags
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.IMAGE }}
+          tags: |
+            type=raw,value=latest,enable={{is_default_branch}}
+            type=semver,pattern={{version}}
+            type=sha,prefix=,format=short
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max