Replace references to old versions of Bazel with 1.0

Change-Id: I2998e0b13ec3f9df4d7ec2a5bccdf46a66d9e065
diff --git a/Dockerfile b/Dockerfile
index 92fc209..47c1897 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 ARG JDK_VER=11
-ARG BAZEL_VER=0.27.0
+ARG BAZEL_VER=1.0.0
 ARG JOBS=2
 
 # First stage is the build environment.