chore(ci): release container tarball

.releaserc.yml

@@ -4,4 +4,10 @@ branches:
 plugins:
   - "@semantic-release/commit-analyzer"
   - "@semantic-release/release-notes-generator"
-  - "@semantic-release/github"
+  - - "@semantic-release/exec"
+    - prepareCmd: "make build-container-tarball VERSION=${nextRelease.version}"
+  - - "@semantic-release/github"
+    - assets:
+      - path: "target/sonic_exporter.tar.gz"
+        label: "Container tarball"
+

Makefile

@@ -11,3 +11,8 @@ LDFLAGS = -ldflags "-X main.Version=${VERSION} -X main.GitHash=${GIT_HASH} -X ma
 build:
 	CGO_ENABLED=0 go build ${LDFLAGS} -v -o target/sonic_exporter .
 
+.PHONY: build-container-tarball
+build-container-tarball:
+	docker build -t sonic_exporter .
+	docker image save sonic_exporter -o target/sonic_exporter.tar
+	gzip target/sonic_exporter.tar