feat: add local sharing and containerized web/server layout

docker/Dockerfile

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+FROM node:22-alpine AS build
+
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm ci
+COPY . .
+RUN npm run build
+
+FROM node:22-alpine AS runtime
+
+ENV NODE_ENV=production
+ENV SHARESERVER_PORT=8787
+ENV SHARESERVER_HOST=0.0.0.0
+ENV SHARESERVER_DATA_DIR=/app/data
+WORKDIR /app
+
+COPY package.json package-lock.json ./
+RUN npm ci --omit=dev && mkdir -p /app/data && chown node:node /app/data
+COPY --from=build /app/dist/web ./dist/web
+COPY --from=build /app/dist/server ./dist/server
+
+USER node
+EXPOSE 8787
+HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
+  CMD node -e "fetch('http://127.0.0.1:' + process.env.SHARESERVER_PORT + '/api/v1/public/health', { signal: AbortSignal.timeout(4000) }).then(r => process.exit(r.ok ? 0 : 1)).catch(() => process.exit(1))"
+
+CMD ["node", "dist/server/server/src/index.js"]

docker/Dockerfile.dockerignore

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+build-server
+dist
+node_modules
+*.log
+*.png
+.git
+data
+.env
+.env.*

docker/compose.yaml

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+name: goodbuddy-shareserver
+
+services:
+  shareserver:
+    build:
+      context: ..
+      dockerfile: docker/Dockerfile
+    ports:
+      - "8787:8787"
+    volumes:
+      - type: bind
+        source: ../data
+        target: /app/data
+        bind:
+          create_host_path: false
+    restart: unless-stopped