diff --git a/.github/workflows/docker-caddy.yml b/.github/workflows/docker-caddy.yml
index fbba805..6d503da 100644
--- a/.github/workflows/docker-caddy.yml
+++ b/.github/workflows/docker-caddy.yml
@@ -1,7 +1,9 @@
 name: docker-caddy
 
 on:
-  workflow_dispatch:
+  push:
+    tags:
+      - "caddy*"
 
 jobs:
   build:
diff --git a/.github/workflows/docker-dev-env.yml b/.github/workflows/docker-dev-env.yml
deleted file mode 100644
index 9a2ce13..0000000
--- a/.github/workflows/docker-dev-env.yml
+++ /dev/null
@@ -1,31 +0,0 @@
-name: docker-dev-env
-
-on:
-  workflow_dispatch:
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Check out code
-        uses: actions/checkout@v4
-
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-
-      - name: Login to Docker Hub
-        uses: docker/login-action@v3
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-
-      - name: Build and push
-        uses: docker/build-push-action@v5
-        with:
-          push: true
-          tags: nite07/dev-env:latest
-          platforms: linux/amd64
-          context: ./dev-env
diff --git a/.github/workflows/docker-tailscale-derper.yml b/.github/workflows/docker-tailscale-derper.yml
index 84ee047..e025c3e 100644
--- a/.github/workflows/docker-tailscale-derper.yml
+++ b/.github/workflows/docker-tailscale-derper.yml
@@ -1,9 +1,9 @@
 name: docker-tailscale-derper
 
 on:
-  schedule:
-    - cron: "0 0 * * 1"
-  workflow_dispatch:
+  push:
+    tags:
+      - "tailscale*"
 
 jobs:
   build:
diff --git a/README.md b/README.md
index f281b22..c26874c 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,2 @@
 - [tailscale derper](./README-tailscale-derper.md)
-- my dev env
+- caddy
diff --git a/dev-env/Dockerfile b/dev-env/Dockerfile
deleted file mode 100644
index 303c36f..0000000
--- a/dev-env/Dockerfile
+++ /dev/null
@@ -1,42 +0,0 @@
-FROM debian:12
-
-RUN apt-get update && apt-get install -y \
-    curl \
-    git \
-    vim \
-    wget \
-    unzip \
-    make \
-    gcc \
-    build-essential \
-    openssh-server
-
-RUN rm -rf /var/lib/apt/lists/*
-
-ENV GO_VERSION=1.21.3
-RUN curl -OL https://go.dev/dl/go${GO_VERSION}.linux-amd64.tar.gz
-RUN tar -C /usr/local -xzf go${GO_VERSION}.linux-amd64.tar.gz
-RUN rm go${GO_VERSION}.linux-amd64.tar.gz
-
-ENV PATH=$PATH:/usr/local/go/bin
-ENV GOPATH=/go
-ENV PATH=$PATH:$GOPATH/bin
-
-WORKDIR /workspace
-
-RUN go install github.com/go-delve/delve/cmd/dlv@latest
-RUN go install golang.org/x/tools/gopls@latest
-RUN go install github.com/golangci/golangci-lint/cmd/golangci-lint@latest
-RUN go install github.com/goreleaser/goreleaser/v2@latest
-
-RUN mkdir /var/run/sshd
-RUN sed -i 's/#PermitRootLogin prohibit-password/PermitRootLogin yes/' /etc/ssh/sshd_config
-RUN sed -i 's/#PasswordAuthentication yes/PasswordAuthentication yes/' /etc/ssh/sshd_config
-
-EXPOSE 22
-
-COPY start.sh /start.sh
-RUN chmod +x /start.sh
-
-ENTRYPOINT ["/start.sh"]
-CMD ["bash"]
diff --git a/dev-env/docker-compose.yaml b/dev-env/docker-compose.yaml
deleted file mode 100644
index e3b3e3d..0000000
--- a/dev-env/docker-compose.yaml
+++ /dev/null
@@ -1,12 +0,0 @@
-services:
-  dev-env:
-    image: nite07/dev-env:latest
-    volumes:
-      - ./workspace:/workspace
-    restart: unless-stopped
-    tty: true
-    stdin_open: true
-    ports:
-      - 2222:22
-    environment:
-      - SSH_PASSWORD=changeme
diff --git a/dev-env/start.sh b/dev-env/start.sh
deleted file mode 100644
index 460adb9..0000000
--- a/dev-env/start.sh
+++ /dev/null
@@ -1,13 +0,0 @@
-#!/bin/bash
-
-if [ -z "$SSH_PASSWORD" ]; then
-    echo "Error: SSH_PASSWORD is not set. Please provide a password."
-    exit 1
-fi
-
-echo "root:$SSH_PASSWORD" | chpasswd
-echo "SSH password for root is set to: $SSH_PASSWORD"
-
-service ssh start
-
-exec "$@"