added images folder and adjusted file iteration

examples/images/img_0.jpg

diff --git a/examples/images/img_0.jpg b/examples/images/img_0.jpg
new file mode 100644
index 0000000..f8dbf32
--- /dev/null
+++ b/examples/images/img_0.jpg
Binary files differ

schema/validate.js

diff --git a/schema/validate.js b/schema/validate.js
index aeb383b..67b35fe 100644
--- a/schema/validate.js
+++ b/schema/validate.js
@@ -51,8 +51,10 @@
 }
 
 fs.readdir(examplesDirectory, (err, files) => {
-  totalFiles = files.length;
   files.forEach(fileName => {
-      fs.readFile(examplesDirectory + fileName,  'utf8',  (error, data) => validateFile(error, data, fileName));
+      if (fileName.indexOf('.json') !== -1) {
+        totalFiles += 1;
+        fs.readFile(examplesDirectory + fileName,  'utf8',  (error, data) => validateFile(error, data, fileName));
+      }
   });
 });
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