use php 8.1

Dockerfile

@@ -1,17 +1,17 @@
-FROM docker.io/alpine:3.16 AS builder
+FROM docker.io/alpine:3.17 AS builder
 
 RUN apk add --no-cache \
-    php8 \
-    php8-phar \
-    php8-mbstring \
-    php8-openssl \
-    php8-ctype \
-    php8-gd \
-    php8-dom \
-    php8-xml \
-    php8-ldap \
-    php8-xmlreader \
-    php8-xmlwriter
+  php81 \
+  php81-phar \
+  php81-mbstring \
+  php81-openssl \
+  php81-ctype \
+  php81-gd \
+  php81-dom \
+  php81-xml \
+  php81-ldap \
+  php81-xmlreader \
+  php81-xmlwriter
 
 ENV COMPOSER_VERSION=2.1.6
 ENV COMPOSER_SHA256_SUM=72524ccebcb071968eb83284507225fdba59f223719b2b3f333d76c8a9ac6b72
@@ -27,7 +27,7 @@ RUN echo "$SHA256_SUM  roundcubemail-$VERSION-complete.tar.gz" | sha256sum -c -
 RUN mkdir -p /var/lib/roundcube
 RUN tar xzf roundcubemail-$VERSION-complete.tar.gz -C /var/lib/roundcube --strip 1
 
-FROM docker.io/thallian/php8-fpm:3.16
+FROM docker.io/thallian/php8-fpm:3.17
 
 RUN apk add --no-cache \
   openssl \
@@ -36,34 +36,33 @@ RUN apk add --no-cache \
   postgresql-client \
   aspell \
   ca-certificates \
-    php8 \
-    php8-imap \
-    php8-dom \
-    php8-json \
-    php8-xml \
-    php8-session \
-    php8-pdo \
-    php8-pdo_pgsql \
-    php8-sockets \
-    php8-exif \
-    php8-iconv \
-    php8-openssl \
-    php8-mbstring \
-    php8-sockets \
-    php8-pecl-mcrypt \
-    php8-zip \
-    php8-pspell \
-    php8-pecl-apcu \
-    php8-gd \
-    php8-ctype \
-    php8-xmlreader \
-    php8-xmlwriter \
-    php8-tokenizer \
-    php8-curl \
-    php8-simplexml \
-    php8-xml \
-    php8-dom \
-    php8-intl
+  php81 \
+  php81-imap \
+  php81-dom \
+  php81-json \
+  php81-xml \
+  php81-session \
+  php81-pdo \
+  php81-pdo_pgsql \
+  php81-sockets \
+  php81-exif \
+  php81-iconv \
+  php81-openssl \
+  php81-mbstring \
+  php81-sockets \
+  php81-zip \
+  php81-pspell \
+  php81-pecl-apcu \
+  php81-gd \
+  php81-ctype \
+  php81-xmlreader \
+  php81-xmlwriter \
+  php81-tokenizer \
+  php81-curl \
+  php81-simplexml \
+  php81-xml \
+  php81-dom \
+  php81-intl
 
 COPY --from=builder --chown=nginx:nginx /var/lib/roundcube /var/lib/roundcube