Update README (#306)

Author: beevelop

README.md

@@ -10,32 +10,29 @@
 
 # Node.js 14 based on Ubuntu 20.04.
 
----
-
-### Pull from Docker Hub
+### Pull, build or run this image
+```bash
+# pull the most recent tag / release
+docker pull beevelop/nodejs:v2021.06.1
 
-```
-docker pull beevelop/nodejs:latest
-```
+# or run the image interactively
+docker run --rm --name beevelop -it beevelop/nodejs:v2021.06.1 bash
 
-### Build from GitHub
-
-```
+# or build the image from GitHub
 docker build -t beevelop/nodejs github.com/beevelop/docker-nodejs
 ```
 
-### Run image
-
-```
-docker run -it beevelop/nodejs bash
+### Or use as base image
+```Dockerfile
+FROM beevelop/nodejs:v2021.06.1
 ```
 
-### Use as base image
+---
 
-```Dockerfile
-FROM beevelop/nodejs:latest
-```
+![Beevelop's Docker Image Hierarchy](https://gist.githubusercontent.com/beevelop/b0cddab7209a683c77560d06ff00bc8e/raw/15429ee1d02e2c4dc019b760ca8c7ceff5911b82/hierarchy.png)
 
 ---
 
-![One does not simply use latest](https://i.imgflip.com/1fgwxr.jpg)
+### Use tags where possible, because...
+
+![One does not simply use latest](https://i.imgflip.com/1fgwxr.jpg)