diff --git a/README.md b/README.md
index bd0f88d..a3a25a8 100644
--- a/README.md
+++ b/README.md
@@ -11,11 +11,74 @@
 
  * Branch: auto-images
 
- * Directory: `/docs/images`
+ * Directory: `/docs/images/badges`
 
 ## Usage
 
-Use this with CI tools
+### Development Environment
+
+#### Building & Testing
+
+##### Setup environment
+
+```bash
+npm install && npm install --only=dev
+```
+
+##### Building
+
+```bash
+npm run build
+```
+
+##### Testing
+
+```bash
+npm test
+```
+
+#### Preview
+
+The following scripts create `/.preview.html` which shows every created artifacts
+ - `npm run preview`
+ - `npm run build`
+ - `npm run test` (or `npm test`)
+
+If `/sh/previewer.sh` is a file, the file will run as a bash script with `$1` is path to `/.preview.html`
+
+### Deployment Environment
+
+#### Branch vs Tag
+
+If you push changes to a branch, CI tools will test only (by `npm test`)
+
+If you push tags, CI tools will do both test and deploy
+
+There're 3 types of releases depend on tag suffix
+ - `-alpha`: Draft Release
+ - `-beta`: Prerelease
+ - no suffix: Official & Stable Release
+
+Deployment is vary, depends on which environment variable is turned on
+
+#### GitHub Release
+
+This type of deployment requires `GITHUB_RELEASE_OAUTH`
+
+#### Gist Repository
+
+This type of deployment requires 3 environment variables
+ - `RELEASE_GIST` is set to `TRUE`
+ - `GIST_ID`
+ - `GIST_TOKEN`
+
+#### GitHub Repository Commit
+
+This type of deployment requires 4 environment variables
+ - `TARGET_GITHUB_RELEASE_OAUTH` (optional, default to `GITHUB_RELEASE_OAUTH`)
+ - `TARGET_GITHUB_REPO_OWNER`
+ - `TARGET_GITHUB_REPO_NAME`
+ - `TARGET_GITHUB_REPO_BRANCH`
 
 ## License
 
diff --git a/deploy/github-target-repo/index.js b/deploy/github-target-repo/index.js
index 94efe68..2fd8b20 100644
--- a/deploy/github-target-repo/index.js
+++ b/deploy/github-target-repo/index.js
@@ -74,7 +74,7 @@ function * main () {
   const parents = [baseCommitSHA]
   const {sha: baseTreeSHA, tree: baseTree} = yield github.gitdata.getTree({user, repo, sha: baseCommitSHA})
   info('Base Tree SHA', baseTreeSHA)
-  info({baseTree, baseTreeSHA, baseCommitSHA, baseRefSHA})
+  info({baseTreeSHA, baseCommitSHA, baseRefSHA})
   info(`Reading ${ARTIFACTS_DIRECTORY}`)
   const list = readdirSync(ARTIFACTS_DIRECTORY)
     .map(
@@ -120,7 +120,6 @@ function * main () {
     ({path}) => listpath.every(([diff]) => path !== diff)
   )
   const resultTree = [...restTree, ...diffTree]
-  info({listpath, diffTree, restTree, baseTree, resultTree})
   const {sha: tree} = yield github.gitdata.createTree({tree: resultTree, base_tree: baseTreeSHA, user, repo})
   info('New Tree SHA', tree)
   const message = (