feat: Add username and useremail options (#67)

* feat: Add username and useremail options
* docs: Add Git username and email section

Close #66

Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.10.3
+FROM alpine:3.11.0
 
 RUN apk add --no-cache \
     bash \

README.md

@@ -71,6 +71,7 @@ Do you want to skip the docker build step? OK, the script mode is available.
   - [⭐️ Keeping existing files](#%EF%B8%8F-keeping-existing-files)
   - [⭐️ Deploy to external repository](#%EF%B8%8F-deploy-to-external-repository)
   - [⭐️ Force orphan](#%EF%B8%8F-force-orphan)
+  - [⭐️ Set Git username and email](#%EF%B8%8F-set-git-username-and-email)
   - [⭐️ Script mode](#%EF%B8%8F-script-mode)
 - [Tips and FAQ](#tips-and-faq)
   - [⭐️ Use the latest and specific release](#%EF%B8%8F-use-the-latest-and-specific-release)
@@ -311,6 +312,23 @@ This allows you to make your publish branch with only the latest commit.
     forceOrphan: true
 ```
 
+### ⭐️ Set Git username and email
+
+Set custom `git config user.name` and `git config user.email`.
+A commit is always created with the same user.
+
+```yaml
+- name: Deploy
+  uses: peaceiris/actions-gh-pages@v2
+  env:
+    ACTIONS_DEPLOY_KEY: ${{ secrets.ACTIONS_DEPLOY_KEY }}
+    PUBLISH_BRANCH: gh-pages
+    PUBLISH_DIR: ./public
+  with:
+    username: "iris"
+    useremail: "iris@peaceiris.com"
+```
+
 ### ⭐️ Script mode
 
 From `v2.5.0`, we can run this action as a shell script.

entrypoint.sh

@@ -92,7 +92,7 @@ elif git clone --depth=1 --single-branch --branch "${remote_branch}" "${remote_r
         git rm -r --ignore-unmatch '*'
     fi
 
-    find "${GITHUB_WORKSPACE}/${PUBLISH_DIR}" -maxdepth 1 | \
+    find "${GITHUB_WORKSPACE}/${PUBLISH_DIR}" -maxdepth 1 -not -name ".git" -not -name ".github" | \
         tail -n +2 | \
         xargs -I % cp -rf % "${local_dir}/"
 else