feat(searxng): 添加Caddy配置文件

添加stack.yml用于定义SearXNG和Redis的docker-compose服务配置
添加Caddyfile作为反向代理配置，包含安全头设置和缓存策略

searxng/Caddyfile

@@ -0,0 +1,91 @@
+{
+	admin off
+
+	log {
+		output stderr
+		format filter {
+			# Preserves first 8 bits from IPv4 and 32 bits from IPv6
+			request>remote_ip ip_mask 8 32
+			request>client_ip ip_mask 8 32
+
+			# Remove identificable information
+			request>remote_port delete
+			request>headers delete
+			request>uri query {
+				delete url
+				delete h
+				delete q
+			}
+		}
+	}
+
+	servers {
+		client_ip_headers X-Forwarded-For X-Real-IP
+
+		# Allow the following IP to passthrough the "X-Forwarded-*" headers to SearXNG
+		# https://caddyserver.com/docs/caddyfile/options#trusted-proxies
+		trusted_proxies static private_ranges
+		trusted_proxies_strict
+	}
+}
+
+{$SEARXNG_HOSTNAME}
+
+tls {$SEARXNG_TLS}
+
+encode zstd gzip
+
+@api {
+	path /config
+	path /healthz
+	path /stats/errors
+	path /stats/checker
+}
+
+@static {
+	path /static/*
+}
+
+@imageproxy {
+	path /image_proxy
+}
+
+header {
+	# CSP (https://content-security-policy.com)
+	Content-Security-Policy "upgrade-insecure-requests; default-src 'none'; script-src 'self'; style-src 'self' 'unsafe-inline'; form-action 'self' https:; font-src 'self'; frame-ancestors 'self'; base-uri 'self'; connect-src 'self'; img-src * data:; frame-src https:;"
+
+	# Disable browser features
+	Permissions-Policy "accelerometer=(),camera=(),geolocation=(),gyroscope=(),magnetometer=(),microphone=(),payment=(),usb=()"
+
+	# Only allow same-origin requests
+	Referrer-Policy "same-origin"
+
+	# Prevent MIME type sniffing from the declared Content-Type
+	X-Content-Type-Options "nosniff"
+
+	# Comment header to allow indexing by search engines
+	X-Robots-Tag "noindex, nofollow, noarchive, nositelinkssearchbox, nosnippet, notranslate, noimageindex"
+    
+	# enable HSTS
+	# WARNING: Once this value is set, the site must continue to support HTTPS until the expiry time is reached.
+
+	# Strict-Transport-Security max-age=15768000;
+
+	# Remove "Server" header
+	-Server
+}
+
+header @api {
+	Access-Control-Allow-Methods "GET, OPTIONS"
+	Access-Control-Allow-Origin "*"
+}
+
+route {
+	# Cache policy
+	header Cache-Control "no-cache"
+	header @static Cache-Control "public, max-age=30, stale-while-revalidate=60"
+	header @imageproxy Cache-Control "public, max-age=3600"
+}
+
+# SearXNG
+reverse_proxy localhost:8080

searxng/stack.yml

@@ -1,6 +1,6 @@
 # mkdir -pv /data/volumes/searxng/{redis-data,etc-searxng}
-# pull:: docker compose --env-file ./searxng/env.cfg -f ./searxng/searxng.stack.yml pull
+# pull:: docker compose --env-file ./searxng/env.cfg -f ./searxng/stack.yml pull
-# Run:: docker compose --env-file ./searxng/env.cfg -f ./searxng/searxng.stack.yml up -d
+# Run:: docker compose --env-file ./searxng/env.cfg -f ./searxng/stack.yml up -d
 
 services: