[ADD] ssh key text as env variable

README.md

@@ -190,6 +190,12 @@ the `known_hosts` file is provided.  This can help avoid issues for hosts with
 dynamic IP addresses, but removes some additional protection against DNS
 spoofing attacks.  Host IP Checking is enabled by default.
 
+#### ENV_SSH_KEY
+
+You can specify the SSH key using Environnement variable, please note
+that SSH_KEY_FILE parameter will be ignored
+
+
 #### SSH_KEY_FILE
 
 In the event you wish to store the key in Docker Secrets, you may wish to

rootfs/entrypoint.sh

@@ -1,8 +1,11 @@
 #!/usr/bin/dumb-init /bin/sh
 source version.sh
-
+if [ -n "${ENV_SSH_KEY}" ]; then
+    echo "$ENV_SSH_KEY" > /id_rsa/custom_rsa
+    KEY_FILE=/id_rsa/custom_rsa
+else KEY_FILE=${SSH_KEY_FILE:=/id_rsa}
+fi
 # Set up key file
-KEY_FILE=${SSH_KEY_FILE:=/id_rsa}
 if [ ! -f "${KEY_FILE}" ]; then
     echo "[FATAL] No SSH Key file found"
     exit 1