ci: 1. trigger ci in pr

2. build latest image in tag ci

.github/workflows/go.yaml

@@ -2,6 +2,7 @@ name: Go
 
 on:
   - push
+  - pull_request
 
 jobs:
 

.github/workflows/release.yaml

@@ -34,7 +34,7 @@ jobs:
             VERSION=nightly
           fi
           TAGS="${DOCKER_IMAGE}:${VERSION}"
-          if [[ $VERSION =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
+          if [[ $VERSION =~ ^v[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
             TAGS="$TAGS,${DOCKER_IMAGE}:latest"
           fi
           echo ::set-output name=tags::${TAGS}