allow adding user to existing container

README.md

@@ -148,6 +148,19 @@ bindmount /data/common /home/peter/common
 bindmount /data/docs /home/peter/docs --read-only
 ```
 
+# Add user to you container
+You can add users to your running container like this:
+
+with docker
+```
+docker exec <container_id> /entrypoint --adduser bar:abc:1004:100:incomming
+```
+
+with docker-compose
+```
+docker-compose exec sftp /entrypoint --adduser baz:xyz:1003:100
+```
+
 # What's the difference between Debian and Alpine?
 
 The biggest differences are in size and OpenSSH version.

entrypoint

@@ -96,6 +96,16 @@ if [ "$1" == "--readme" ]; then
     exit 0
 fi
 
+# Add user to an existing container (with docker exec )
+if [ "$1" == "--adduser" ]; then
+  shift
+  for user in "$@"; do
+     echo "$user" >> "$userConfFinalPath"
+     createUser "$user"
+  done
+  exit 0
+fi
+
 # Create users only on first run
 if [ ! -f "$userConfFinalPath" ]; then