Add Docker deployment configuration

.dockerignore

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+# Dependencies and build output (rebuilt inside image)
+node_modules
+dist
+
+# Version control
+.git
+.gitignore
+.gitattributes
+
+# Documentation
+doc/
+*.md
+**/*.md
+
+# Editor and OS junk
+.vscode
+.idea
+.directory
+.DS_Store
+Thumbs.db
+
+# Environment files
+.env
+.env.*
+
+# Docker files themselves
+Dockerfile
+.dockerignore
+docker-compose*.yml
+stack.yml

Dockerfile

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+# syntax=docker/dockerfile:1.7
+
+# ---- Stage 1: Build ----
+FROM node:20-alpine AS builder
+
+WORKDIR /app
+
+# Copy manifests first for cache efficiency
+COPY package.json package-lock.json ./
+RUN npm ci
+
+# Copy source and build
+COPY . .
+RUN npm run build
+
+# ---- Stage 2: Runtime ----
+FROM nginx:alpine
+
+# Replace default config with SPA-aware one
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+# Copy built static assets
+COPY --from=builder /app/dist /usr/share/nginx/html
+
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+    CMD wget --quiet --tries=1 --spider http://localhost/ || exit 1
+
+EXPOSE 80

nginx.conf

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+server {
+    listen 80;
+    server_name _;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    gzip on;
+    gzip_vary on;
+    gzip_min_length 256;
+    gzip_comp_level 6;
+    gzip_types
+        text/plain
+        text/css
+        text/javascript
+        application/javascript
+        application/json
+        application/xml
+        image/svg+xml;
+
+    # Vite emits hashed filenames in /assets/ — cache aggressively
+    location /assets/ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+        try_files $uri =404;
+    }
+
+    # index.html must NOT be cached — it points at the current bundle hash
+    location = /index.html {
+        add_header Cache-Control "no-cache, no-store, must-revalidate";
+        expires off;
+    }
+
+    # SPA fallback (defensive — your app has no router today, but harmless)
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    server_tokens off;
+}

stack.yml

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+version: '3.8'
+
+services:
+  ptk:
+    image: git.bennu.duckdns.org/jshackney/pilot-toolkit-web:latest
+    networks:
+      - cluster-net
+    deploy:
+      replicas: 2
+      update_config:
+        parallelism: 1
+        order: start-first
+        failure_action: rollback
+        delay: 10s
+      rollback_config:
+        parallelism: 1
+        order: stop-first
+      restart_policy:
+        condition: on-failure
+        max_attempts: 3
+      labels:
+        - traefik.enable=true
+        - traefik.http.routers.ptk.rule=Host(`ptk.bennu.duckdns.org`)
+        - traefik.http.routers.ptk.entrypoints=websecure
+        - traefik.http.routers.ptk.tls.certresolver=letsencrypt
+        - traefik.http.services.ptk.loadbalancer.server.port=80
+        - traefik.docker.network=cluster-net
+        - traefik.http.routers.ptk.middlewares=crowdsec@docker
+      resources:
+        limits:
+          memory: 64M
+        reservations:
+          memory: 16M
+
+networks:
+  cluster-net:
+    external: true