Do not create users on container restart

entrypoint

@@ -35,6 +35,11 @@ function createUser() {
         gid="${param[3]}"
     fi
 
+    if $(cat /etc/passwd | cut -d: -f3 | grep -q "$uid"); then
+        echo "User with UID \"$uid\" already exists, skipping."
+        return 0
+    fi
+
     useraddOptions="--no-user-group"
 
     if [ -n "$uid" ]; then
@@ -75,6 +80,9 @@ if [ "$1" == "--readme" ]; then
     exit 0
 fi
 
+# Create final config
+if [ ! -f "$userConfFinalPath" ]; then
+
     # Append mounted config to final config
     if [ -f "$userConfPath" ]; then
         cat "$userConfPath" >> "$userConfFinalPath"
@@ -103,4 +111,6 @@ while IFS= read -r user || [[ -n "$user" ]]; do
         createUser "$user"
     done < "$userConfFinalPath"
 
+fi
+
 exec /usr/sbin/sshd -D