Initial commit: Infrastructure host tracking app

Fastify + node:sqlite single-process app with vanilla JS UI for
looking up hosts by hardware ID, hostname, or asset ID. Includes
per-host network interface tracking, sites/rooms/server-types CRUD,
Docker packaging, and a Gitea Actions workflow that runs tests then
builds and pushes to gitea.thewrightserver.net/josh/infrastructure.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Dockerfile

@@ -0,0 +1,13 @@
+FROM node:22-alpine
+RUN addgroup -S app && adduser -S app -G app
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm ci --omit=dev
+
+COPY . .
+RUN mkdir -p /app/data && chown -R app:app /app
+USER app
+
+EXPOSE 3000
+CMD ["node", "src/server.js"]