Implement the ability to change the ssh port to match what is in the gitea config (#7286)

* - rearrange the templates to make it more logical because now ssh_config is a template
- implemented the updating of the port to the same as the port sent to the gitea config

* change the filename back

Author: christhomas

docker/root/etc/s6/openssh/setup

@@ -24,6 +24,13 @@ if [ ! -f /data/ssh/ssh_host_ecdsa_key ]; then
     ssh-keygen -t ecdsa -b 256 -f /data/ssh/ssh_host_ecdsa_key -N "" > /dev/null
 fi
 
+if [ -d /etc/ssh ]; then
+    SSH_PORT=${SSH_PORT:-"22"} \
+    envsubst < /etc/templates/sshd_config > /etc/ssh/sshd_config
+
+    chmod 0644 /etc/ssh/sshd_config
+fi
+
 chown root:root /data/ssh/*
 chmod 0700 /data/ssh
 chmod 0600 /data/ssh/*

docker/root/etc/ssh/sshd_config renamed to docker/root/etc/templates/sshd_config

@@ -1,4 +1,4 @@
-Port 22
+Port ${SSH_PORT}
 Protocol 2
 
 AddressFamily any