Beautify startup

Signed-off-by: Knut Ahlers <knut@ahlers.me>

Dockerfile

@@ -21,5 +21,4 @@ ADD sshd_config /etc/ssh/sshd_config
 VOLUME ["/data", "/ssh"]
 EXPOSE 22
 
-ENTRYPOINT ["/usr/local/bin/dumb-init"]
-CMD ["/usr/local/bin/start.sh"]
+ENTRYPOINT ["/usr/local/bin/start.sh"]

start.sh

@@ -1,21 +1,38 @@
-#!/bin/bash
+#!/usr/local/bin/dumb-init /bin/bash
 set -euo pipefail
 
+COLOR_CYAN="\033[0;36m"
+COLOR_PLAIN="\033[0m"
+
+function info {
+  echo -e "${COLOR_CYAN}$@${COLOR_PLAIN}"
+}
+
+function step {
+    info "[$(date +%H:%M:%S)] $@"
+}
+
+step "Checking SSH host keys..."
 for type in rsa dsa ecdsa ed25519; do
   if ! [ -e "/ssh/ssh_host_${type}_key" ]; then
-    echo "/ssh/ssh_host_${type}_key not found, generating..."
-    ssh-keygen -f "/ssh/ssh_host_${type}_key" -N '' -t ${type}
+    info "Generating /ssh/ssh_host_${type}_key..."
+    ssh-keygen -f "/ssh/ssh_host_${type}_key" -N '' -t ${type} 2>&1 >/dev/null
   fi
 
   ln -sf "/ssh/ssh_host_${type}_key" "/etc/ssh/ssh_host_${type}_key"
 done
 
-if ( id ${USER} ); then
-    echo "INFO: User ${USER} already exists"
+step "Checking user for existence..."
+if ( id ${USER} 2>/dev/null ); then
+    info "INFO: User ${USER} already exists"
 else
-    echo "INFO: User ${USER} does not exists, we create it"
+    info "INFO: User ${USER} does not exists, we create it"
     ENC_PASS=$(echo ${PASS} | openssl passwd -1 -stdin)
     useradd -d /data -m -p ${ENC_PASS} -u ${USER_UID} -s /bin/sh ${USER}
+    echo
+    info "User \"${USER}\" created with password \"${PASS}\"."
+    echo
 fi
 
+step "Running SSHd..."
 exec /usr/sbin/sshd -D