Restore Docker and nginx deployment files from remote initial commit

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

.dockerignore

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+node_modules
+dist
+.git

Dockerfile

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+FROM node:20-alpine AS build
+WORKDIR /app
+COPY . .
+RUN node build.mjs
+
+FROM nginx:alpine
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+COPY --from=build /app/dist /usr/share/nginx/html
+EXPOSE 80

nginx.conf

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+server {
+  listen 80;
+  root /usr/share/nginx/html;
+  index index.html;
+  gzip on;
+  gzip_types text/css application/javascript image/svg+xml application/xml;
+
+  location /assets/ {
+    add_header Cache-Control "public, max-age=604800, stale-while-revalidate=86400";
+  }
+
+  location / {
+    try_files $uri $uri/index.html =404;
+  }
+
+  error_page 404 /404.html;
+}