typo in usage instructions

Author: ehough

README.md

@@ -31,7 +31,7 @@ The container requires you to supply it with your desired [NFS exports](https://
          -v /host/files:/nfs \
          --cap-add SYS_ADMIN \
          -p 2049:2049 \
-         erichough/nfs4-server:latest`
+         erichough/nfs-server:latest`
          
 1. **Supply each line of `/etc/exports` as an environment variable**.
 
@@ -44,7 +44,7 @@ The container requires you to supply it with your desired [NFS exports](https://
          -v /host/path/bar:/nfs/bar \
          --cap-add SYS_ADMIN \
          -p 2049:2049 \
-         erichough/nfs4-server:latest`
+         erichough/nfs-server:latest`
 
 ### Configuration
 
@@ -101,4 +101,4 @@ Via optional environment variables, you can adjust the server settings to your n
 This work was based heavily on prior projects:
 
 - [f-u-z-z-l-e/docker-nfs-server](https://github.com/f-u-z-z-l-e/docker-nfs-server)
-- [sjiveson/nfs-server-alpine](https://github.com/sjiveson/nfs-server-alpine)
+- [sjiveson/nfs-server-alpine](https://github.com/sjiveson/nfs-server-alpine)