Update for initial code

.gitignore

@@ -0,0 +1 @@
+password.txt

unlock.as

@@ -0,0 +1,10 @@
+do shell script "caffeinate -u -t 3"
+set theFile to POSIX file "./password.txt"
+set theFile to theFile as alias
+set theFileContents to paragraphs of (read file theFile)
+
+tell application "System Events"
+    keystroke (item 1 of theFileContents as string)
+    delay 1
+    keystroke return
+end tell

unlock.php

@@ -0,0 +1,3 @@
+<?php
+header("Location: unlock_action.php");
+?>

unlock_action.php

@@ -0,0 +1,4 @@
+<?php
+echo shell_exec("osascript './unlock.as'");
+header("Location: unlock_finished.php");
+?>

unlock_finished.php

@@ -0,0 +1 @@
+Thank you!