Fix building process.

Dockerfile

@@ -1,26 +1,23 @@
-FROM code.pztrn.name/containers/mirror/alpine:3.16
+FROM code.pztrn.name/containers/mirror/alpine:3.16.0
 
 # Install necessary things
 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 && \
-    rm /etc/nginx/conf.d/default.conf && \
-    rm /etc/php7/php-fpm.d/www.conf && \
-    mkdir /var/run/nginx && \
-    chown -R nginx:nginx /var/run/nginx 
+    rm /etc/php8/php-fpm.d/www.conf
 
 # Get rainloop.
 RUN mkdir -p /var/www/rainloop && \