Nginx configure file for single page application(SPA)

nginx.conf

user nobody;
worker_processes auto;
worker_rlimit_nofile 65535;

events {
	multi_accept on;
	worker_connections 65535;
}

http {
	charset utf-8;
	sendfile on;
	tcp_nopush on;
	tcp_nodelay on;
	server_tokens off;
	log_not_found off;
	types_hash_max_size 2048;
	client_max_body_size 16M;

	# MIME
	include mime.types;
	default_type application/octet-stream;

	# logging
	access_log /var/log/nginx/access.log;
	error_log /var/log/nginx/error.log warn;

	# load configs
	include /etc/nginx/conf.d/*.conf;

	# www.example.com
	server {
		listen 80;
		listen [::]:80;
	
		server_name www.example.com;
		root /www/html;
	
		# logging
		access_log /var/log/nginx/example.com.access.log;
		error_log /var/log/nginx/example.com.error.log warn;
	
		# index.html fallback
		location / {
			try_files $uri $uri/ /index.html;
		}
	
		# reverse proxy
		location /api {
			proxy_pass http://backend:8080;
			proxy_http_version	1.1;
			proxy_cache_bypass	$http_upgrade;
			
			proxy_set_header Upgrade			$http_upgrade;
			proxy_set_header Connection 		"upgrade";
			proxy_set_header Host				$host;
			proxy_set_header X-Real-IP			$remote_addr;
			proxy_set_header X-Forwarded-For	$proxy_add_x_forwarded_for;
			proxy_set_header X-Forwarded-Proto	$scheme;
			proxy_set_header X-Forwarded-Host	$host;
			proxy_set_header X-Forwarded-Port	$server_port;
		}
	
		# security headers
		add_header X-Frame-Options "SAMEORIGIN" always;
		add_header X-XSS-Protection "1; mode=block" always;
		add_header X-Content-Type-Options "nosniff" always;
		add_header Referrer-Policy "no-referrer-when-downgrade" always;
		add_header Content-Security-Policy "default-src * data: 'unsafe-eval' 'unsafe-inline'" always;
		
		# . files
		location ~ /\.(?!well-known) {
			deny all;
		}
		
		# favicon.ico
		location = /favicon.ico {
			log_not_found off;
			access_log off;
		}
		
		# robots.txt
		location = /robots.txt {
			log_not_found off;
			access_log off;
		}
		
		# assets, media
		location ~* \.(?:css(\.map)?|js(\.map)?|jpe?g|png|gif|ico|cur|heic|webp|tiff?|mp3|m4a|aac|ogg|midi?|wav|mp4|mov|webm|mpe?g|avi|ogv|flv|wmv)$ {
			expires 7d;
			access_log off;
		}
		
		# svg, fonts
		location ~* \.(?:svgz?|ttf|ttc|otf|eot|woff2?)$ {
			add_header Access-Control-Allow-Origin "*";
			expires 7d;
			access_log off;
		}
		
		# gzip
		gzip on;
		gzip_vary on;
		gzip_proxied any;
		gzip_comp_level 6;
		gzip_types text/plain text/css text/xml application/json application/javascript application/xml+rss application/atom+xml image/svg+xml;
	}
}