Consider Using Git Tags for Versions

[berney]

I saw in the readme you provide links to Dockerfiles for older revisions.
Have you considered using git tags for these commits, and then the hyperlinks could be references to the tags.

$ git show-ref --tags --abbrev
3e4df0f refs/tags/5.1
fdac15a refs/tags/5.1.17
2ead91d refs/tags/5.1.18
a29642c refs/tags/5.1.19
5368ab2 refs/tags/5.1.21
3e4df0f refs/tags/5.1.22
e5bd122 refs/tags/5.1.23
5797dec refs/tags/5.2.0

diff --git a/README.md b/README.md
index 95ba442..9abbca0 100644
--- a/README.md
+++ b/README.md
@@ -1,13 +1,13 @@
 # Supported tags and respective `Dockerfile` links

 - [`5.2.1`, `5.2`, `5`, `latest` (*5/Dockerfile*)](https://github.com/elasticdog/tiddlywiki-docker/blob/master/5/Dockerfile)
-- [`5.2.0`, (*5/Dockerfile @ 5797dec*)](https://github.com/elasticdog/tiddlywiki-docker/blob/5797dec96dcdae75b60925ca9422eece800223ce/5/Dockerfile)
-- [`5.1.23` `5.1` (*5/Dockerfile* @e5bd122)](https://github.com/elasticdog/tiddlywiki-docker/blob/e5bd1226fbc21b7747ebd7bad22a8c7673ab8b0c/5/Dockerfile)
-- [`5.1.22` (*5/Dockerfile* @ 3e4df0f)](https://github.com/elasticdog/tiddlywiki-docker/blob/3e4df0f8a33db4fac6724ada969705c1622a5af0/5/Dockerfile)
-- [`5.1.21` (*5/Dockerfile* @ 5368ab2)](https://github.com/elasticdog/tiddlywiki-docker/blob/5368ab2480dd98dfdbd611e6344e2d6e3c389369/5/Dockerfile)
-- [`5.1.19` (*5/Dockerfile* @ a29642c)](https://github.com/elasticdog/tiddlywiki-docker/blob/a29642cab96186390b6866e45f56cd74807c39ba/5/Dockerfile)
-- [`5.1.18` (*5/Dockerfile* @ 2ead91d)](https://github.com/elasticdog/tiddlywiki-docker/blob/2ead91df276b99724e795c96cdd59e26c367d8d9/5/Dockerfile)
-- [`5.1.17` (*5/Dockerfile* @ fdac15a)](https://github.com/elasticdog/tiddlywiki-docker/blob/fdac15a3a930365c98e3474492465e77e0148c55/5/Dockerfile)
+- [`5.2.0`](https://github.com/elasticdog/tiddlywiki-docker/blob/5.2.0/5/Dockerfile)
+- [`5.1.23` `5.1`](https://github.com/elasticdog/tiddlywiki-docker/blob/5.1.23/5/Dockerfile)
+- [`5.1.22`](https://github.com/elasticdog/tiddlywiki-docker/blob/5.1.22/5/Dockerfile)
+- [`5.1.21`https://github.com/elasticdog/tiddlywiki-docker/blob/5.1.21/5/Dockerfile)
+- [`5.1.19`](https://github.com/elasticdog/tiddlywiki-docker/blob/5.1.19/5/Dockerfile)
+- [`5.1.18`](https://github.com/elasticdog/tiddlywiki-docker/blob/5.1.18/5/Dockerfile)
+- [`5.1.17`](https://github.com/elasticdog/tiddlywiki-docker/blob/5.1.17/5/Dockerfile)

 ## TiddlyWiki Docker

What do you think?