Add Dockerfile and nginx config for self-hosted deployment

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

Dockerfile

@@ -0,0 +1,10 @@
+FROM node:20-alpine AS builder
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm ci
+COPY . .
+RUN npm run build
+
+FROM nginx:alpine
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+COPY --from=builder /app/dist /usr/share/nginx/html

nginx.conf

@@ -0,0 +1,11 @@
+server {
+    listen 80;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    include /etc/nginx/mime.types;
+
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+}