Add Coolify Docker config

Dockerfile

@@ -0,0 +1,35 @@
+# syntax=docker/dockerfile:1
+
+FROM node:20-alpine AS builder
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm install
+
+COPY . .
+RUN npm run build
+
+FROM nginx:alpine
+COPY --from=builder /app/dist /usr/share/nginx/html
+
+COPY <<'EOF' /etc/nginx/conf.d/default.conf
+server {
+    listen 80;
+    server_name _;
+
+    root /usr/share/nginx/html;
+    index index.html;
+
+    location / {
+        try_files $uri /index.html;
+    }
+
+    location /assets/ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+}
+EOF
+
+EXPOSE 80
+CMD ["nginx", "-g", "daemon off;"]