update docker readme [ci skip] [circleci skip]

DOCKER/README.md

@@ -1,7 +1,8 @@
 # Supported tags and respective `Dockerfile` links
 
-- `0.8.0`, `0.8`, `latest` [(Dockerfile)](https://github.com/tendermint/tendermint/blob/bf64dd21fdb193e54d8addaaaa2ecf7ac371de8c/DOCKER/Dockerfile)
-- `develop` [(Dockerfile)]()
+- `0.9.0`, `0.9`, `latest` [(Dockerfile)](https://github.com/tendermint/tendermint/blob/d474baeeea6c22b289e7402449572f7c89ee21da/DOCKER/Dockerfile)
+- `0.8.0`, `0.8` [(Dockerfile)](https://github.com/tendermint/tendermint/blob/bf64dd21fdb193e54d8addaaaa2ecf7ac371de8c/DOCKER/Dockerfile)
+- `develop` [(Dockerfile)](https://github.com/tendermint/tendermint/blob/master/DOCKER/Dockerfile.develop)
 
 `develop` tag points to the [develop](https://github.com/tendermint/tendermint/tree/develop) branch.