diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..0e6e539
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,15 @@
+FROM line/kubectl-kustomize:1.20.2-3.9.1
+
+RUN mkdir -p /app
+WORKDIR /app
+COPY entrypoint.sh .
+RUN chmod +x entrypoint.sh
+
+ENV SSH_KEY=
+ENV CONTAINER_REPO=
+ENV MANIFEST_HOST=
+ENV MANIFEST_USER=
+ENV MANIFEST_REPO=
+ENV SVC_PATH=
+
+ENTRYPOINT ["/app/entrypoint.sh"]
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..50fabc2
--- /dev/null
+++ b/README.md
@@ -0,0 +1,29 @@
+# Update Kustomization
+A Drone CI plugin for updating an image tag in using kustomize.
+
+Environment variables:
+- `SSH_KEY`: Base64-encoded private key of your manifest repo
+- `MANIFEST_HOST`: Git server host
+- `MANIFEST_USER`: Git user
+- `MANIFEST_REPO`: Git repository
+- `CONTAINER_REPO`: Container repository
+- `SVC_PATH`: Relative path to the target service manifest
+
+Example usage in a Drone pipeline:
+```yaml
+...
+- name: update-kustomization
+  pull: if-not-exists
+  image: minghsu0107/update-kustomization:v1.0.0
+  environment:
+    SSH_KEY:
+      from_secret: ssh_key
+    MANIFEST_HOST: git.mycompany.com
+    MANIFEST_USER: myuser
+    MANIFEST_REPO: mysvc
+    CONTAINER_REPO: harbor.mycompany.com/myuser/mysvc
+    SVC_PATH: staging/mysvc
+  when:
+    event: push
+```
+Where `staging/mysvc` is the kustomization folder path relative to the project root.
\ No newline at end of file
diff --git a/entrypoint.sh b/entrypoint.sh
new file mode 100644
index 0000000..954a52c
--- /dev/null
+++ b/entrypoint.sh
@@ -0,0 +1,7 @@
+#!/bin/sh
+apk update && apk add --no-cache git && apk add --no-cache openssh
+mkdir -p ~/.ssh && echo $SSH_KEY | base64 -d > ~/.ssh/id_rsa && chmod 700 ~/.ssh/id_rsa && ssh-keyscan $MANIFEST_HOST >> ~/.ssh/known_hosts
+rm -rf $MANIFEST_REPO && git clone ssh://git@$MANIFEST_HOST/$MANIFEST_USER/$MANIFEST_REPO.git
+cd $MANIFEST_REPO/$SVC_PATH && kustomize edit set image $CONTAINER_REPO:${DRONE_COMMIT_BRANCH}-${DRONE_COMMIT_SHA:0:7}
+git add . && git commit -m "🚀 update to ${DRONE_COMMIT_BRANCH}-${DRONE_COMMIT_SHA:0:7}"
+git push ssh://git@$MANIFEST_HOST/$MANIFEST_USER/$MANIFEST_REPO.git
\ No newline at end of file