Release 0.9.1 with PHP 8.0

Relates to #52

apache.dockerfile

@@ -7,7 +7,7 @@ ADD https://github.com/sabre-io/Baikal/releases/download/$VERSION/baikal-$VERSIO
 RUN apk add unzip && unzip -q baikal-$VERSION.zip
 
 # Final Docker image
-FROM php:8.1-apache
+FROM php:8.0-apache
 
 LABEL description="Baikal is a Cal and CardDAV server, based on sabre/dav, that includes an administrative interface for easy management."
 LABEL version="0.9.1"

nginx.dockerfile

@@ -22,17 +22,17 @@ RUN curl -o /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg
   apt remove -y lsb-release   &&\
   apt update                  &&\
     apt install -y            \
-    php8.1-curl               \
-    php8.1-fpm                \
-    php8.1-mbstring           \
-    php8.1-mysql              \
-    php8.1-sqlite3            \
-    php8.1-xml                \
+    php8.0-curl               \
+    php8.0-fpm                \
+    php8.0-mbstring           \
+    php8.0-mysql              \
+    php8.0-sqlite3            \
+    php8.0-xml                \
     sqlite3                   \
     sendmail                  &&\
   rm -rf /var/lib/apt/lists/* &&\
-  sed -i 's/www-data/nginx/' /etc/php/8.1/fpm/pool.d/www.conf &&\
-  sed -i 's/^listen = .*/listen = \/var\/run\/php-fpm.sock/' /etc/php/8.1/fpm/pool.d/www.conf
+  sed -i 's/www-data/nginx/' /etc/php/8.0/fpm/pool.d/www.conf &&\
+  sed -i 's/^listen = .*/listen = \/var\/run\/php-fpm.sock/' /etc/php/8.0/fpm/pool.d/www.conf
 
 # Add Baikal & nginx configuration
 COPY --from=builder baikal /var/www/baikal
@@ -41,4 +41,4 @@ COPY files/nginx.conf /etc/nginx/conf.d/default.conf
 
 VOLUME /var/www/baikal/config
 VOLUME /var/www/baikal/Specific
-CMD /etc/init.d/php8.1-fpm start && chown -R nginx:nginx /var/www/baikal/Specific && nginx -g "daemon off;"
+CMD /etc/init.d/php8.0-fpm start && chown -R nginx:nginx /var/www/baikal/Specific && nginx -g "daemon off;"