Implement versioning ADR (#124)

* Implement versioning ADR

* Update to handle tags that contain -rc

.github/renovate.json

@@ -3,7 +3,7 @@
     "github>rancher/renovate-config#release"
   ],
   "baseBranches": [
-    "master"
+    "main", "release/v0.3", "release/v0.4", "release/v0.5"
   ],
   "prHourlyLimit": 2
 }

.github/workflows/release.yaml

@@ -0,0 +1,23 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - v*
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name : Checkout repository
+        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+
+      - name: Create release on Github
+        run: |
+          if [[ "${{ github.ref_name }}" == *-rc* ]]; then
+            gh --repo "${{ github.repository }}" release create ${{ github.ref_name }} --verify-tag --generate-notes --prerelease
+          else
+            gh --repo "${{ github.repository }}" release create ${{ github.ref_name }} --verify-tag --generate-notes
+          fi

README.md

@@ -10,3 +10,7 @@ By default, a newly signed certificate is set to expire 365 days (1 year) after
 You can use the `CATTLE_NEW_SIGNED_CERT_EXPIRATION_DAYS` environment variable to change this value.
 
 **Please note:** the value for the aforementioned variable must be a string representing an unsigned integer corresponding to the number of days until expiration (i.e. X509 "NotAfter" value).
+
+# Versioning
+
+See [VERSION.md](VERSION.md).

VERSION.md

@@ -0,0 +1,10 @@
+DynamicListener follows a pre-release (v0.x) strategy of semver. There is limited compatibility between releases, though we do aim to avoid breaking changes on minor version lines. DynamicListener aims to support a limited set of Kubernetes minor versions (all values below are inclusive in start and end). The current supported versions of DynamicListener are as follows:
+
+The current supported release lines are:
+
+| DynamicListener Branch | DynamicListener Minor version | Kubernetes Version Range |
+|--------------------------|------------------------------------|------------------------------------------------|
+| main | v0.6 | v1.27+ |
+| release/v0.5 | v0.5 | v1.26 - v1.30 |
+| release/v0.4 | v0.4 | v1.25 - v1.28 |
+| release/v0.3 | v0.3 | v1.23 - v1.27 |