diff --git a/docker/Dockerfile b/docker/Dockerfile
index bee0e909..725bc2c6 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -13,18 +13,11 @@ RUN docker-php-ext-install mysqli mbstring xml
 RUN rm -rf /var/www/html/docker/
 COPY ./ /var/www/html/
 WORKDIR /var/www/html
+# Setting permissions as: https://github.com/magicbug/Cloudlog/wiki/Installation
 RUN cd /var/www/html \
-&& echo "Setting root as owner of the folder..." \
-&& chown -R root:root /var/www/html \
-&& echo "Setting permissions to the install folder" \
-&& chown -R root:www-data ./application/config/ \
-&& chown -R root:www-data ./application/logs/ \
-&& chown -R root:www-data ./assets/qslcard/ \
-&& chown -R root:www-data ./backup/ \
-&& chown -R root:www-data ./updates/ \
-&& chown -R root:www-data ./uploads/ \
-&& chown -R root:www-data ./images/eqsl_card_images/ \
-&& chown -R root:www-data ./assets/json/ \
+&& echo "Setting root as owner of the html folder" \
+&& chown -R root:www-data /var/www/html
+RUN echo "Setting permissions to the install folder" \
 && chmod -R g+rw ./application/config/ \
 && chmod -R g+rw ./application/logs/ \
 && chmod -R g+rw ./assets/qslcard/ \
@@ -33,6 +26,4 @@ RUN cd /var/www/html \
 && chmod -R g+rw ./uploads/ \
 && chmod -R g+rw ./images/eqsl_card_images/ \
 && chmod -R g+rw ./assets/json/ \
-&& chmod 777 /var/www/html/install \
-&& echo "Make sure everything is fine" \
-&& dir -ls
+&& chmod -R 777 /var/www/html/install
\ No newline at end of file
diff --git a/install/includes/core_class.php b/install/includes/core_class.php
index 37604e26..09cc9ee1 100644
--- a/install/includes/core_class.php
+++ b/install/includes/core_class.php
@@ -123,5 +123,4 @@ class Core {
 	}
 
 }
-?>
-
+?>
\ No newline at end of file
diff --git a/install/includes/database_class.php b/install/includes/database_class.php
index 4cdc634c..b843862e 100644
--- a/install/includes/database_class.php
+++ b/install/includes/database_class.php
@@ -43,5 +43,4 @@ class Database {
 		return true;
 	}
 }
-?>
-
+?>
\ No newline at end of file
diff --git a/install/index.php b/install/index.php
index cc0e5d8b..1e65398d 100644
--- a/install/index.php
+++ b/install/index.php
@@ -7,13 +7,21 @@ $db_file_path = $db_config_path."database.php";
 
 function delDir($dir) {
 	$files = glob( $dir . '*', GLOB_MARK );
-    foreach( $files as $file ){
-        if( substr( $file, -1 ) == '/' )
-            delDir( $file );
-        else
-            unlink( $file );
+    foreach ( $files as $file ) {
+        if ( substr( $file, -1 ) == '/' ) {
+			if (file_exists($file)) {
+            	delDir( $file );
+			}
+		} else {
+			if (file_exists($file)) {
+				unlink( $file );
+			}
+		}
     }
-    rmdir( $dir );
+	// This step may be not needed
+    if (file_exists($dir)) {
+		rmdir( $dir );
+	}
 }
 
 if (file_exists($db_file_path)) {