Update Docker image to PHP 8.1

Dockerfile

@@ -9,12 +9,13 @@ EXPOSE 80 443
 ARG VERSION
 
 RUN apk --no-cache --update add \
-    tzdata openssl unzip nginx bash ca-certificates s6 curl ssmtp mailx php8 php8-phar php8-curl \
-    php8-fpm php8-json php8-zlib php8-xml php8-dom php8-ctype php8-opcache php8-zip php8-iconv \
-    php8-pdo php8-pdo_mysql php8-pdo_sqlite php8-pdo_pgsql php8-mbstring php8-session php8-bcmath \
-    php8-gd php8-openssl php8-sockets php8-posix php8-ldap php8-simplexml && \
+    tzdata openssl unzip nginx bash ca-certificates s6 curl ssmtp mailx php81 php81-phar php81-curl \
+    php81-fpm php81-json php81-zlib php81-xml php81-dom php81-ctype php81-opcache php81-zip php81-iconv \
+    php81-pdo php81-pdo_mysql php81-pdo_sqlite php81-pdo_pgsql php81-mbstring php81-session php81-bcmath \
+    php81-gd php81-openssl php81-sockets php81-posix php81-ldap php81-simplexml && \
     rm -rf /var/www/localhost && \
-    rm -f /etc/php8/php-fpm.d/www.conf
+    rm -f /etc/php81/php-fpm.d/www.conf && \
+    ln -s /usr/bin/php81 /usr/bin/php
 
 ADD . /var/www/app
 ADD docker/ /

docker/etc/php81/php-fpm.conf

@@ -16,4 +16,4 @@ pm.start_servers = 1
 pm.min_spare_servers = 1
 pm.max_spare_servers = 3
 pm.max_requests = 2048
-include = /etc/php8/php-fpm.d/env.conf
+include = /etc/php81/php-fpm.d/env.conf

docker/etc/services.d/php/run

@@ -1,2 +1,2 @@
 #!/bin/execlineb -P
-php-fpm8 -F
+php-fpm81 -F