Add copywrite config (#378)

diff --git a/.copywrite.hcl b/.copywrite.hcl
new file mode 100644
index 0000000..132e471
--- /dev/null
+++ b/.copywrite.hcl
@@ -0,0 +1,10 @@
+schema_version = 1
+
+project {
+  license        = "MPL-2.0"
+  copyright_year = 2020
+
+  header_ignore = [
+    "tfexec/internal/e2etest/testdata/**",
+  ]
+}