Changed page flow to first save file and then redirect to check.

On check numbers in file are validated.

Posting to check then uploads file to s3

app/main/uploader.py

@@ -0,0 +1,15 @@
+import os
+import uuid
+
+from boto3 import resource
+
+
+# TODO add service name to bucket name as well
+def s3upload(filepath):
+    filename = filepath.split(os.path.sep)[-1]
+    upload_id = str(uuid.uuid4())
+    s3 = resource('s3')
+    s3.create_bucket(Bucket=upload_id)
+    key = s3.Object(upload_id, filename)
+    key.put(Body=open(filepath, 'rb'), ServerSideEncryption='AES256')
+    return upload_id