switch to php 8.1

Dockerfile

@@ -20,13 +20,13 @@ RUN composer install
 # |--------------------------------------------------------------------------
 # | Install Webserver
 # |--------------------------------------------------------------------------
-FROM gitlab.jonasled.de/jonasled/nginx-php-minimal:8-latest as production
+FROM gitlab.jonasled.de/jonasled/nginx-php-minimal:81-latest as production
 ENV PHP_FILE_UPLOADS=Off \
     PHP_MAX_POST=1M
 
 
 RUN apk update && \
-    apk add php8-mysqli php8-mbstring php8-curl php8-simplexml --no-cache && \
+    apk add php81-mysqli php81-mbstring php81-curl php81-simplexml --no-cache && \
     rm /etc/nginx/http.d/default.conf
 
 COPY --from=composer /build/public .