Add Dockerfile and make-based tooling

Change-Id: I6471c3bc2040a0a9c9c49b45beee6fcd11c77a3c
diff --git a/openolt/.gitignore b/openolt/.gitignore
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/openolt/.gitignore
@@ -0,0 +1 @@
+