Change SHA-implementation and make sure signature is correctly generated

deployment_files/deploy.yaml

@@ -52,6 +52,10 @@ spec:
         env:
           - name: S3_BUCKET_NAME
             value: upload.unbound.se
+          - name: AWS_REGION
+            value: eu-west-1
+          - name: RETURN_URL
+            value: uploads.unbound.se
         ports:
         - containerPort: 80