Update Dockerfile: use Apline v3.20

Author: macbre

Dockerfile

@@ -79,7 +79,7 @@ ARG CONFIG="\
 		--add-dynamic-module=/usr/src/ngx_http_geoip2_module \
 	"
 
-FROM alpine:3.19 AS base
+FROM alpine:3.20 AS base
 
 ARG NGINX_VERSION
 ARG NGINX_COMMIT
@@ -204,7 +204,7 @@ RUN \
 			| xargs -r apk info --installed \
 			| sort -u > /tmp/runDeps.txt
 
-FROM alpine:3.19
+FROM alpine:3.20
 ARG NGINX_VERSION
 ARG NGINX_COMMIT
 ARG NGINX_USER_UID