Add Dockerfile and GHCR publish workflow triggered on version tags

.dockerignore

@@ -0,0 +1,10 @@
+node_modules
+build
+.svelte-kit
+.gitdb
+data
+.env
+.env.*
+!.env.example
+*.log
+.husky

.github/workflows/docker-publish.yml

@@ -0,0 +1,53 @@
+name: Docker – Build & Publish
+
+on:
+  push:
+    tags:
+      - 'v*.*.*'
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-push:
+    name: Build and push Docker image
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Log in to the Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

Dockerfile

@@ -0,0 +1,34 @@
+# ─── Stage 1: build ─────────────────────────────────────────────────────────
+FROM oven/bun:1 AS builder
+
+WORKDIR /app
+
+# Install dependencies (leverage layer cache)
+COPY package.json bun.lock ./
+RUN bun install --frozen-lockfile
+
+# Copy the rest of the source and build
+COPY . .
+RUN bun run build
+
+# Prune dev dependencies so only production deps are kept
+RUN bun install --frozen-lockfile --production
+
+# ─── Stage 2: production image ───────────────────────────────────────────────
+FROM node:22-alpine AS runner
+
+WORKDIR /app
+
+ENV NODE_ENV=production
+
+# SvelteKit adapter-node output lives in build/
+COPY --from=builder /app/build ./build
+COPY --from=builder /app/node_modules ./node_modules
+COPY --from=builder /app/package.json ./package.json
+
+# Persistent data directory (SQLite DB + gitdb clone)
+VOLUME ["/app/data"]
+
+EXPOSE 3000
+
+CMD ["node", "build"]