Make release tag pattern not prefixed with 'v'.

Signed-off-by: Jianfei Hu <[email protected]>

.github/workflows/release.yaml

@@ -3,7 +3,7 @@ name: "release" # please read on RELEASE.md on how to trigger this workflow.
 on:
   push:
     tags:
-      - "v[0-9]+.[0-9]+.[0-9]+**"  # For example: v0.5.0 v0.5.1-rc2
+      - "[0-9]+.[0-9]+.[0-9]+**"  # For example: 0.5.0, 0.5.1-rc2.
 
 defaults:
   run: # use bash for all operating systems unless overridden.
@@ -73,8 +73,9 @@ jobs:
         if: matrix.mode == 'clang-fips'
         run: echo "BAZEL_FLAGS=--config=libc++ --define=boringssl=fips" >> $GITHUB_ENV
 
-      - name: Create artifacts # We strip the "v"-prefix from the current tag.
-        run: VERSION=${GITHUB_REF#refs/tags/v} MODE=${{ matrix.mode }} make dist
+      - name: Create artifacts
+        # GITHUB_REF: refs/tags/0.5.1-rc1, resulted VERSION: "0.5.1".
+        run: VERSION=${GITHUB_REF#refs/tags/} MODE=${{ matrix.mode }} make dist
 
       - name: Require static binary
         if: runner.os == 'Linux' && matrix.mode == 'clang'

RELEASE.md

@@ -3,10 +3,24 @@
 ## Release workflow
 
 The release workflow defined in [`.github/workflows/release.yaml`](./.github/workflows/release.yaml)
-will be triggered whenever a tag that matches `v[0-9]+.[0-9]+.[0-9]+**` (examples of valid tags:
-`v0.5.0`, `v0.5.1-rc2`) is created. The workflow invokes the `make dist` command to create tarballs
+will be triggered whenever a tag that matches `[0-9]+.[0-9]+.[0-9]+**` (examples of valid tags:
+`0.5.0`, `0.5.1-rc2`) is created. The workflow invokes the `make dist` command to create tarballs
 from the combination of `os` (`darwin` and `linux`) with the selected mode (`default`, `clang`, and
 `clang-fips`). The tarball name pattern will be: `auth_server_<os>_amd64_<mode>_<version>.tar.gz`.
-The version is the same as the given tag with `v` prefix removed. After the tarballs are created,
-the workflow uploads the tarballs as attachments to the created release entry on
-https://github.com/istio-ecosystem/authservice/releases.
+After the tarballs are created, the workflow uploads the tarballs as attachments to the created
+release entry on https://github.com/istio-ecosystem/authservice/releases.
+
+## Make a Release
+
+To make a release, create an tag at the commit you want. For example
+
+```sh
+git tag -a "0.5.1"
+git push upstsream HEAD # You must have admin permission for the repo.
+```
+
+Github Action will detect the newly created tags and trigger the workflow. Check [Action Runs](https://github.com/istio-ecosystem/authservice/actions)
+and watch for its completion.
+
+Once workflow completes, go to [Release](https://github.com/istio-ecosystem/authservice/releases)
+page and draft the release notes, provide Docker image links.