ci: add Woodpecker CI pipeline and Dockerfile for containerized deployment

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.woodpecker.yml

@@ -0,0 +1,18 @@
+when:
+  branch: high-performance
+  event: push
+
+steps:
+  - name: build-and-push
+    image: woodpeckerci/plugin-docker-buildx
+    settings:
+      registry: ghcr.io
+      repo: ghcr.io/traceworks2023/nxtgauge-admin-solid
+      dockerfile: Dockerfile
+      tags:
+        - high-performance-latest
+      username:
+        from_secret: GHCR_USERNAME
+      password:
+        from_secret: GHCR_TOKEN
+      platforms: linux/amd64

Dockerfile

@@ -0,0 +1,19 @@
+FROM node:20-alpine AS builder
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm ci
+
+COPY . .
+RUN npm run build
+
+FROM node:20-alpine
+WORKDIR /app
+
+COPY --from=builder /app/.output ./.output
+
+ENV PORT=3000
+ENV HOST=0.0.0.0
+EXPOSE 3000
+
+CMD ["node", ".output/server/index.mjs"]