ci(fix): run CI jobs on tags too (#58)

Signed-off-by: Dave Henderson <dhenderson@gmail.com>

.github/workflows/build.yml

@@ -2,6 +2,7 @@ name: Build
 on:
   push:
     branches: [ main ]
+    tags: [ 'v*' ]
   pull_request:
     branches: [ main ]
 

.github/workflows/docker.yml

@@ -2,6 +2,7 @@ name: Docker Build
 on:
   push:
     branches: [ main ]
+    tags: [ 'v*' ]
   pull_request:
     branches: [ main ]
 
@@ -32,55 +33,47 @@ jobs:
       id: buildx
       uses: docker/setup-buildx-action@v3
       with:
-        version: v0.12.1
+        version: latest
         driver-opts: |
           image=moby/buildkit:buildx-stable-1
           network=host
-    - name: determine if this is a tag
-      run: |
-        if (git describe --abbrev=0 --exact-match &>/dev/null); then
-          tag=$(git describe --abbrev=0 --exact-match)
-          echo "is_tag=true" >> $GITHUB_ENV
-          echo "git_tag=$tag" >> $GITHUB_ENV
-          # splits the major version from $tag - assumes it's a 3-part semver
-          echo "major_version=${tag%%\.*}" >> $GITHUB_ENV
-        fi
-      if: github.repository == 'hairyhenderson/sagemcom_fast_exporter'
     - name: Login to GHCR
       uses: docker/login-action@v3
       with:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
-      if: github.repository == 'hairyhenderson/sagemcom_fast_exporter' && (github.ref == 'refs/heads/main' || env.is_tag == 'true')
+      if: github.repository == 'hairyhenderson/sagemcom_fast_exporter' && (github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/'))
     - name: Login to DockerHub
       uses: docker/login-action@v3
       with:
         username: hairyhenderson
         password: ${{ secrets.DOCKERHUB_TOKEN }}
-      if: github.repository == 'hairyhenderson/sagemcom_fast_exporter' && (github.ref == 'refs/heads/main' || env.is_tag == 'true')
+      if: github.repository == 'hairyhenderson/sagemcom_fast_exporter' && (github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/'))
     - name: Build & Push (non-main branch)
       run: |
         set -ex
-        make docker-multi COMMIT=${{ github.sha }} DOCKER_REPO=localhost:5000/${IMG_NAME} BUILDX_ACTION=--push
+        make docker-multi COMMIT=${{ github.sha }} DOCKER_REPO=localhost:5000/${{ github.repository }} BUILDX_ACTION=--push
 
-        docker buildx imagetools create --dry-run -t localhost:5000/${IMG_NAME}:dev localhost:5000/${IMG_NAME}:latest
-        docker buildx imagetools create --dry-run -t localhost:5000/${IMG_NAME}:dev-alpine localhost:5000/${IMG_NAME}:alpine
+        docker buildx imagetools create --dry-run -t localhost:5000/${{ github.repository }}:dev localhost:5000/${{ github.repository }}:latest
+        docker buildx imagetools create --dry-run -t localhost:5000/${{ github.repository }}:dev-alpine localhost:5000/${{ github.repository }}:alpine
       if: github.repository != 'hairyhenderson/sagemcom_fast_exporter' || github.ref != 'refs/heads/main'
     - name: Build & Push (main/tags)
       run: |
-        src_repo=hairyhenderson/${IMG_NAME}
+        src_repo=${{ github.repository}}
 
         set -x
         make docker-multi COMMIT=${{ github.sha }} DOCKER_REPO=${src_repo} BUILDX_ACTION=--push
 
         set -x
-        docker buildx imagetools create -t ghcr.io/hairyhenderson/${IMG_NAME}:latest ${src_repo}:latest
-        docker buildx imagetools create -t ghcr.io/hairyhenderson/${IMG_NAME}:alpine ${src_repo}:alpine
-      if: github.repository == 'hairyhenderson/sagemcom_fast_exporter' && (github.ref == 'refs/heads/main' || env.is_tag == 'true')
+        docker buildx imagetools create -t ghcr.io/${src_repo}:latest ${src_repo}:latest
+        docker buildx imagetools create -t ghcr.io/${src_repo}:alpine ${src_repo}:alpine
+      if: github.repository == 'hairyhenderson/sagemcom_fast_exporter' && (github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/'))
     - name: Push (tagged release)
       run: |
-        src_repo=hairyhenderson/${IMG_NAME}
+        src_repo=${{ github.repository }}
+        git_tag=${{ github.ref_name }}
+        major_version=${git_tag%%\.*}
 
         set -x
         repo=$src_repo
@@ -89,9 +82,9 @@ jobs:
         docker buildx imagetools create -t ${repo}:${git_tag}-alpine ${src_repo}:alpine
         docker buildx imagetools create -t ${repo}:${major_version}-alpine ${src_repo}:alpine
 
-        repo=ghcr.io/hairyhenderson/${IMG_NAME}
+        repo=ghcr.io/${{ github.repository }}
         docker buildx imagetools create -t ${repo}:${git_tag} ${src_repo}:latest
         docker buildx imagetools create -t ${repo}:${major_version} ${src_repo}:latest
         docker buildx imagetools create -t ${repo}:${git_tag}-alpine ${src_repo}:alpine
         docker buildx imagetools create -t ${repo}:${major_version}-alpine ${src_repo}:alpine
-      if: github.repository == 'hairyhenderson/sagemcom_fast_exporter' && env.is_tag == 'true'
+      if: github.repository == 'hairyhenderson/sagemcom_fast_exporter' && startsWith(github.ref, 'refs/tags/')