feat: add Dockerfile and custom nginx configuration

nginx.conf

@@ -0,0 +1,28 @@
+server {
+	listen 80;
+	listen [::]:80;
+	server_name localhost;
+
+	location / {
+		root /usr/share/nginx/html;
+		index index.html index.htm;
+	}
+
+	# Error 404
+	error_page 404 /404.html;
+
+	# General headers applied to all routes
+	add_header X-Frame-Options "DENY";
+	add_header X-XSS-Protection "1; mode=block";
+	add_header X-Content-Type-Options "nosniff";
+	add_header Referrer-Policy "no-referrer-when-downgrade";
+	add_header Permissions-Policy "interest-cohort=()";
+
+	# Special handling for /sw.js
+	location = /sw.js {
+		add_header cache-control "max-age=0, no-cache, no-store, must-revalidate";
+	}
+
+	# Handling missing pages
+	try_files $uri $uri/ /index.html;
+}