Fixes for CI from @code-asher's review

ci/release-container/push.sh

@@ -1,5 +1,4 @@
 #!/usr/bin/env bash
-
 set -euo pipefail
 
 main() {
@@ -8,14 +7,10 @@ main() {
   VERSION="$(pkg_json_version)"
 
   imageTag="codercom/code-server:$VERSION"
-  if [[ $(arch) == "arm64" ]]; then
-    imageTag+="-arm64"
-  fi
 
-  docker build \
-    -t "$imageTag" \
-    -f ./ci/release-container/Dockerfile .
   docker push "$imageTag"
+  docker tag "$imageTag" codercom/code-server:latest
+  docker push codercom/code-server:latest
 }
 
 main "$@"