Revert "Install PHP8.0 instead php8.0-dev (#340)"

This reverts commit 90b27e3.

Author: taylorotwell

runtimes/7.4/Dockerfile

@@ -21,7 +21,7 @@ RUN apt-get update \
     && apt-key adv --homedir ~/.gnupg --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys C300EE8C \
     && echo "deb http://ppa.launchpad.net/ondrej/php/ubuntu impish main" > /etc/apt/sources.list.d/ppa_ondrej_php.list \
     && apt-get update \
-    && apt-get install -y php7.4-cli php7.4 \
+    && apt-get install -y php7.4-cli php7.4-dev \
        php7.4-pgsql php7.4-sqlite3 php7.4-gd \
        php7.4-curl php7.4-memcached \
        php7.4-imap php7.4-mysql php7.4-mbstring \

runtimes/8.0/Dockerfile

@@ -21,7 +21,7 @@ RUN apt-get update \
     && apt-key adv --homedir ~/.gnupg --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys C300EE8C \
     && echo "deb http://ppa.launchpad.net/ondrej/php/ubuntu impish main" > /etc/apt/sources.list.d/ppa_ondrej_php.list \
     && apt-get update \
-    && apt-get install -y php8.0-cli php8.0 \
+    && apt-get install -y php8.0-cli php8.0-dev \
        php8.0-pgsql php8.0-sqlite3 php8.0-gd \
        php8.0-curl php8.0-memcached \
        php8.0-imap php8.0-mysql php8.0-mbstring \
@@ -43,6 +43,8 @@ RUN apt-get update \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
+RUN update-alternatives --set php /usr/bin/php8.0
+
 RUN setcap "cap_net_bind_service=+ep" /usr/bin/php8.0
 
 RUN groupadd --force -g $WWWGROUP sail

runtimes/8.1/Dockerfile

@@ -21,7 +21,7 @@ RUN apt-get update \
     && apt-key adv --homedir ~/.gnupg --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys C300EE8C \
     && echo "deb http://ppa.launchpad.net/ondrej/php/ubuntu impish main" > /etc/apt/sources.list.d/ppa_ondrej_php.list \
     && apt-get update \
-    && apt-get install -y php8.1-cli php8.1 \
+    && apt-get install -y php8.1-cli php8.1-dev \
        php8.1-pgsql php8.1-sqlite3 php8.1-gd \
        php8.1-curl \
        php8.1-imap php8.1-mysql php8.1-mbstring \