diff --git a/.devcontainer/postCreateCommand.sh b/.devcontainer/postCreateCommand.sh
index 9357442f..d8f50136 100755
--- a/.devcontainer/postCreateCommand.sh
+++ b/.devcontainer/postCreateCommand.sh
@@ -1,6 +1,7 @@
 #!/bin/sh
 
 export PATH="$PATH:$HOME/.composer/vendor/bin"
+ln -s ./conf.sample.php cfg/conf.php
 composer install --no-dev --optimize-autoloader
 
 sudo chmod a+x "$(pwd)" && sudo rm -rf /var/www/html && sudo ln -s "$(pwd)" /var/www/html
diff --git a/cfg/conf.sample.php b/cfg/conf.sample.php
index f91c5e89..e9880471 100644
--- a/cfg/conf.sample.php
+++ b/cfg/conf.sample.php
@@ -259,7 +259,7 @@ dir = PATH "data"
 ;version = "latest"
 ;bucket = "my-bucket"
 
-[yourls]
+;[yourls]
 ; When using YOURLS as a "urlshortener" config item:
 ; - By default, "urlshortener" will point to the YOURLS API URL, with or without
 ;   credentials, and will be visible in public on the PrivateBin web page.
@@ -280,4 +280,4 @@ dir = PATH "data"
 ; Subresource integrity (SRI) hashes used in template files. Uncomment and set
 ; these for all js files used. See:
 ; https://github.com/PrivateBin/PrivateBin/wiki/FAQ#user-content-how-to-make-privatebin-work-when-i-have-changed-some-javascript-files
-;privatebin.js = sha512-[…]
+;js/privatebin.js = "sha512-[…]"
diff --git a/tpl/bootstrap.php b/tpl/bootstrap.php
index a0199012..6d7b7483 100644
--- a/tpl/bootstrap.php
+++ b/tpl/bootstrap.php
@@ -42,7 +42,7 @@ if ($SYNTAXHIGHLIGHTING) :
 endif;
 ?>
 		<noscript><link type="text/css" rel="stylesheet" href="css/noscript.css" /></noscript>
-		<?php $this->_scriptTag('js/jquery-3.7.1.js', 'async'); ?>
+		<?php $this->_scriptTag('js/jquery-3.7.1.js', 'defer'); ?>
 <?php
 if ($QRCODE) :
 ?>
@@ -56,8 +56,8 @@ if ($ZEROBINCOMPATIBILITY) :
 endif;
 ?>
 		<?php $this->_scriptTag('js/zlib-1.3.1.js', 'async'); ?>
-		<?php $this->_scriptTag('js/base-x-4.0.0.js', 'async'); ?>
-		<?php $this->_scriptTag('js/rawinflate-0.3.js', 'async'); ?>
+		<?php $this->_scriptTag('js/base-x-4.0.0.js', 'defer'); ?>
+		<?php $this->_scriptTag('js/rawinflate-0.3.js', 'defer'); ?>
 		<?php $this->_scriptTag('js/bootstrap-3.4.1.js', 'defer'); ?>
 <?php
 if ($SYNTAXHIGHLIGHTING) :
diff --git a/tpl/bootstrap5.php b/tpl/bootstrap5.php
index c0686cc8..3d7ac62e 100644
--- a/tpl/bootstrap5.php
+++ b/tpl/bootstrap5.php
@@ -34,15 +34,15 @@ if ($QRCODE) :
 endif;
 if ($ZEROBINCOMPATIBILITY) :
 ?>
-		<?php $this->_scriptTag('js/base64-1.7.js', 'async'); ?>
+		<?php $this->_scriptTag('js/base64-1.7.js', 'defer'); ?>
 <?php
 endif;
 ?>
-		<?php $this->_scriptTag('js/zlib-1.3.1.js', 'async'); ?>
-		<?php $this->_scriptTag('js/base-x-4.0.0.js', 'async'); ?>
-		<?php $this->_scriptTag('js/rawinflate-0.3.js', 'async'); ?>
+		<?php $this->_scriptTag('js/zlib-1.3.1.js', 'defer'); ?>
+		<?php $this->_scriptTag('js/base-x-4.0.0.js', 'defer'); ?>
+		<?php $this->_scriptTag('js/rawinflate-0.3.js', 'defer'); ?>
 		<?php $this->_scriptTag('js/bootstrap-5.3.3.js', 'async'); ?>
-		<?php $this->_scriptTag('js/dark-mode-switch.js', 'async'); ?>
+		<?php $this->_scriptTag('js/dark-mode-switch.js', 'defer'); ?>
 <?php
 if ($SYNTAXHIGHLIGHTING) :
 ?>
@@ -55,7 +55,7 @@ if ($MARKDOWN) :
 <?php
 endif;
 ?>
-		<?php $this->_scriptTag('js/purify-3.1.7.js', 'async'); ?>
+		<?php $this->_scriptTag('js/purify-3.1.7.js', 'defer'); ?>
 		<?php $this->_scriptTag('js/legacy.js', 'async'); ?>
 		<?php $this->_scriptTag('js/privatebin.js', 'defer'); ?>
 		<!-- icon -->