convert README ssh key gen to script

scripts/ssh.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+export REMOTE_USER=${USER}
+export REMOTE_HOST=$1
+export REMOTE_PORT=$2
+
+# The following is generated by the above variables. No tweaks necessary.
+export KEY_NAME=~/.ssh/id_${REMOTE_USER}_${REMOTE_HOST}
+export KEY_COMMENT="${USER}@${HOSTNAME}:${REMOTE_USER}@${REMOTE_HOST}"
+
+ssh-keygen -C ${KEY_COMMENT} -f ${KEY_NAME} -t ed25519
+
+cat <<EOF >> ~/.ssh/config
+
+Host ${REMOTE_HOST}
+    Hostname ${REMOTE_HOST}
+    IdentityFile ${KEY_NAME}
+    User ${REMOTE_USER}
+    Port ${REMOTE_PORT:=22}
+EOF