From 55a3c6e2fe19671ca82f92cc85882f530440608d Mon Sep 17 00:00:00 2001
From: Will Norris <will@tailscale.com>
Date: Tue, 2 Apr 2024 14:44:59 -0700
Subject: [PATCH] use semantic version tagging for docker images

we've never tagged stable releases, but should really do so.  This
change will cause our docker images to be tagged following typical
semver fashion... the initial `v1.0.0` release will be tagged `v1`,
`v1.0`, `v1.0.0`, and `latest`.

Updates #104

Signed-off-by: Will Norris <will@tailscale.com>
---
 .github/workflows/docker.yml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index e026f09..6946fd8 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -45,6 +45,11 @@ jobs:
         uses: docker/metadata-action@96383f45573cb7f253c731d3b3ab81c87ef81934 # v5.0.0
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=ref,event=branch
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
 
       - name: Build and push Docker image
         id: build-and-push