ADDED .fossa file for fossa scans

.fossa.yml

@@ -0,0 +1,14 @@
+# Generated by FOSSA CLI (https://github.com/fossas/fossa-cli)
+# Visit https://fossa.com to learn more
+
+version: 2
+cli:
+  server: https://app.fossa.io
+  fetcher: custom
+  project: git@github.com:docker/buildx
+analyze:
+  modules:
+  - name: github.com/docker/buildx/cmd/buildx
+    type: go
+    target: github.com/docker/buildx/cmd/buildx
+    path: cmd/buildx