Update GoReleaser config (#722)

Changes:
- Updates the configuration to remove '--rm-dist' deprecated flag
- Adds announce section to announce releases in the NGINX Community
  slack
- Removes release section that was limiting the uploads to the binaries
- Changes extension of SBOM artifacts from .sbom to spdx.json to better
  represent the content of the file (.sbom is an extension that devs at
GoReleaser came up with and not standard)
- Adds section to automatically close a milestone on release
- Adds section to override the version that is injected in the binary for
  snapshot builds. These are all the builds that are not an official
release

.github/workflows/ci.yml

@@ -79,6 +79,7 @@ jobs:
     steps:
       - name: Checkout Repository
         uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab # v3.5.2
+
       - name: Setup Node.js Environment
         uses: actions/setup-node@64ed1c7eab4cce3362f8c340dee64e5eaeef8f7c # v3.6.0
         with:
@@ -128,13 +129,14 @@ jobs:
         uses: goreleaser/goreleaser-action@f82d6c1c344bcacabba2c841718984797f664a6b # v4.2.0
         with:
           version: latest
-          args: ${{ startsWith(github.ref, 'refs/tags/') && 'release' || 'build --snapshot' }} --rm-dist
+          args: ${{ startsWith(github.ref, 'refs/tags/') && 'release' || 'build --snapshot' }} --clean
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           GOPATH: ${{ needs.vars.outputs.go_path }}
           AZURE_STORAGE_ACCOUNT: ${{ secrets.AZURE_STORAGE_ACCOUNT }}
           AZURE_STORAGE_KEY: ${{ secrets.AZURE_STORAGE_KEY }}
           AZURE_BUCKET_NAME: ${{ secrets.AZURE_BUCKET_NAME }}
+          SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK_COMMUNITY }}
 
       - name: Cache Artifacts
         uses: actions/cache@88522ab9f39a2ea568f7027eddc7d8d8bc9d59c8 # v3.3.1

.goreleaser.yml

@@ -20,20 +20,26 @@ builds:
 changelog:
   skip: true
 
-checksum:
-  name_template: 'checksums.txt'
-
 archives:
   - id: gateway
 
 sboms:
   - artifacts: archive
-
-release:
-  ids: [gateway]
+    documents:
+      - "${artifact}.spdx.json"
 
 blobs:
   - provider: azblob
     bucket: '{{.Env.AZURE_BUCKET_NAME}}'
-    extra_files:
-      - glob: ./dist/**.sbom
+
+announce:
+  slack:
+    enabled: true
+    channel: '#announcements'
+    message_template: 'NGINX Kubernetes Gateway {{ .Tag }} is out! Check it out: {{ .ReleaseURL }}'
+
+milestones:
+  - close: true
+
+snapshot:
+  name_template: 'edge'