Add Dockerfile for building the library

Change-Id: I58b3ff299ffaa0fd4f0d0ce25c7627ffe7e01550
Signed-off-by: wrider <lji@research.att.com>
diff --git a/.gitreview b/.gitreview
new file mode 100644
index 0000000..25a715d
--- /dev/null
+++ b/.gitreview
@@ -0,0 +1,5 @@
+[gerrit]
+host=gerrit.o-ran-sc.org
+port=29418
+project=o-du/phy
+defaultbranch=master