Run docker workflow on release (#7)

* Bump github.com/gin-contrib/sessions from 0.0.3 to 0.0.4

Bumps [github.com/gin-contrib/sessions](https://github.com/gin-contrib/sessions) from 0.0.3 to 0.0.4.
- [Release notes](https://github.com/gin-contrib/sessions/releases)
- [Commits](gin-contrib/sessions@v0.0.3...v0.0.4)

---
updated-dependencies:
- dependency-name: github.com/gin-contrib/sessions
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

* fix stop button

* version number

* build docker container timetrace and timetrace gui

* tag argument for docker-combined.sh

* update docker workflow to build combined image

* fix build args

* add latest tag to publish docker workflow and docker-compose file

* limit download size of timetrace repo; fix tagging in docker shell

* update readme for docker usage

* replace backtic with  $(STATEMENT)

* publish docker on release

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/publish-docker.yml

@@ -6,9 +6,8 @@ on:
       tag:
         description: 'docker tag'
         required: true
-  push:
-    branches:
-      - 'master'
+  release:
+    types: [published]
 
 jobs:
   docker: