Update to PHP 8.

Dockerfile

@@ -4,16 +4,16 @@ FROM code.pztrn.name/containers/mirror/alpine:3.16.0
 RUN apk add --no-cache \
     git \
     nginx \
-    php7-curl \
-    php7-dom \
-    php7-fpm \
-    php7-iconv \
-    php7-json \
-    php7-openssl \
-    php7-pdo_mysql \
-    php7-pdo_pgsql \
-    php7-pdo_sqlite \
-    php7-xml \
+    php8-curl \
+    php8-dom \
+    php8-fpm \
+    php8-iconv \
+    php8-json \
+    php8-openssl \
+    php8-pdo_mysql \
+    php8-pdo_pgsql \
+    php8-pdo_sqlite \
+    php8-xml \
     s6 \
     unzip \
     wget && \