alpine has moved php8 to php

Dockerfile

@@ -18,20 +18,20 @@ RUN apk -U upgrade \
     nginx \
     s6 \
     su-exec \
-    php8-fpm \
-    php8-curl \
-    php8-iconv \
-    php8-xml \
-    php8-dom \
-    php8-openssl \
-    php8-json \
-    php8-zlib \
-    php8-pdo_pgsql \
-    php8-pdo_mysql \
-    php8-pdo_sqlite \
-    php8-sqlite3 \
-    php8-ldap \
-    php8-simplexml
+    php-fpm \
+    php-curl \
+    php-iconv \
+    php-xml \
+    php-dom \
+    php-openssl \
+    php-json \
+    php-zlib \
+    php-pdo_pgsql \
+    php-pdo_mysql \
+    php-pdo_sqlite \
+    php-sqlite3 \
+    php-ldap \
+    php-simplexml
 WORKDIR /tmp
 RUN set -ex ; \
     wget -q https://github.com/RainLoop/rainloop-webmail/releases/download/v1.17.0/rainloop-legacy-${RAINLOOP_VERSION}.zip ; \