add mnist example files for CI tests

Author: masoud@anyscale.com

zkml/.gitignore

@@ -25,7 +25,9 @@ proof
 
 params_kzg
 params_ipa
-examples
+# Keep examples/mnist for CI tests
+examples/*
+!examples/mnist
 testing/data
 *.diff
 

zkml/examples/mnist/config.msgpack

@@ -0,0 +1,16 @@
+import tensorflow as tf
+import numpy as np
+import msgpack
+from tensorflow import keras
+
+mnist = tf.keras.datasets.mnist
+(images_train, labels_train), (images_test, labels_test) = mnist.load_data()
+
+x = images_test[0]
+y = labels_test[0]
+print(y)
+x = x.flatten() / 255.
+x = x.astype(np.float32)
+
+print(x.dtype, x.shape)
+np.save('5.npy', x)