Install openssh-client, restore php-ssh2

The bookworm base has no /etc/ssh, unlike the stretch base, so appending the
IdentityFile line to /etc/ssh/ssh_config failed the PHP build:

    /bin/sh: 1: cannot create /etc/ssh/ssh_config: Directory nonexistent

Install openssh-client, which ships that file. The compose file mounts the SSH
agent socket into the nodejs container too, so add it there as well.

Also restore php8.5-ssh2, dropped from the extension list by mistake during the
migration; unlike the removed extensions it is still published for PHP 8.x.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QNkYkDFukA7kdCTsnWLrCD

Author: claude

nodejs/Dockerfile

@@ -6,7 +6,7 @@ LABEL maintainer="Milan Sulc <sulcmil@gmail.com>"
 ENV NODE_VERSION=24.19.0
 
 RUN apt-get update && apt-get dist-upgrade -y && \
-    apt-get install -y wget curl git bash-completion gnupg2 && \
+    apt-get install -y wget curl git bash-completion gnupg2 openssh-client && \
     curl -fsSLo /tmp/node.tar.gz "https://nodejs.org/dist/v${NODE_VERSION}/node-v${NODE_VERSION}-linux-x64.tar.gz" && \
     tar -xzf /tmp/node.tar.gz -C /usr/local --strip-components=1 --no-same-owner && \
     rm /tmp/node.tar.gz /usr/local/CHANGELOG.md /usr/local/LICENSE /usr/local/README.md && \

php/8.5-fpm/Dockerfile

@@ -34,7 +34,7 @@ ENV BLACKFIRE_AGENT=tcp://blackfire:8707
 RUN apt-get update && apt-get dist-upgrade -y && \
     # DEPENDENCIES #############################################################
     apt-get install -y --no-install-recommends \
-        wget curl git bash-completion ca-certificates gnupg && \
+        wget curl git bash-completion ca-certificates gnupg openssh-client && \
     mkdir -p /etc/apt/keyrings && \
     # COMPLETION ###############################################################
     cp /etc/skel/.bashrc ~/ && \
@@ -69,6 +69,7 @@ RUN apt-get update && apt-get dist-upgrade -y && \
         php${PHP_VERSION}-redis \
         php${PHP_VERSION}-soap \
         php${PHP_VERSION}-sqlite3 \
+        php${PHP_VERSION}-ssh2 \
         php${PHP_VERSION}-xsl \
         php${PHP_VERSION}-zip \
         php${PHP_VERSION}-xdebug \

php/8.5/Dockerfile

@@ -32,7 +32,7 @@ ENV BLACKFIRE_AGENT=tcp://blackfire:8707
 RUN apt-get update && apt-get dist-upgrade -y && \
     # DEPENDENCIES #############################################################
     apt-get install -y --no-install-recommends \
-        wget curl git bash-completion ca-certificates gnupg && \
+        wget curl git bash-completion ca-certificates gnupg openssh-client && \
     mkdir -p /etc/apt/keyrings && \
     # COMPLETION ###############################################################
     cp /etc/skel/.bashrc ~/ && \
@@ -66,6 +66,7 @@ RUN apt-get update && apt-get dist-upgrade -y && \
         php${PHP_VERSION}-redis \
         php${PHP_VERSION}-soap \
         php${PHP_VERSION}-sqlite3 \
+        php${PHP_VERSION}-ssh2 \
         php${PHP_VERSION}-xsl \
         php${PHP_VERSION}-zip \
         php${PHP_VERSION}-xdebug \