Feature/pdct 987 add autotag release to nav backend (#259)

* Create CODEOWNERS

* Add auto tag section to PR template

* Remove old workflows and scripts

* Add auto tag and release pipeline to CI

* Migrate to docker compose v2 syntax

* Update licence to Apache 2.0

* Rename file to ci-cd.yml

.github/CODEOWNERS

@@ -0,0 +1,15 @@
+###############################################################################
+# GitHub Code-owner Configuration for Navigator Backend
+#
+# Each line is a file pattern followed by one or more owners. See this link:
+# https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners#example-of-a-codeowners-file
+# for more information on configuring GitHub code owners, including examples.
+###############################################################################
+
+# These owners will be the default owners for everything in
+# the repo. Unless a later match takes precedence, members
+# of @climatepolicyradar/tech-devs will be requested for
+# review when someone opens a pull request. Teams should
+# be identified in the format @org/team-name. Teams must have
+# explicit write access to the repository.
+* @climatepolicyradar/tech-devs

.github/pull_request_template.md

@@ -7,6 +7,28 @@ Please include:
 - any additional relevant motivation and context
 - details of any dependency updates that are required for this change
 
+## Proposed version
+
+Please select the option below that is most relevant from the list below. This
+will be used to generate the next tag version name during auto-tagging.
+
+- [ ] Skip auto-tagging
+- [ ] Patch
+- [ ] Minor version
+- [ ] Major version
+
+Visit the [Semver website](https://semver.org/#summary) to understand the
+difference between `MAJOR`, `MINOR`, and `PATCH` versions.
+
+Notes:
+
+- If none of these options are selected, auto-tagging will fail
+- Where multiple options are selected, the most senior option ticked will be
+  used -- e.g. Major > Minor > Patch
+- If you are selecting the version in the list above using the textbox, make
+  sure your selected option is marked `[x]` with no spaces in between the
+  brackets and the `x`
+
 ## Type of change
 
 Please select the option(s) below that are most relevant: