diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 050ba09..8a47c5a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,14 +2,17 @@ name: ci
 
 on:
   schedule:
-    - cron: '0 10 * * *' # everyday at 10am
+    - cron: '0 10 * * *'
   push:
     branches:
       - 'master'
       - 'releases/v*'
+    tags:
+      - 'v*'
   pull_request:
     branches:
       - 'master'
+      - 'releases/v*'
 
 jobs:
   ci:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 041e641..4fb5d6c 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -5,13 +5,10 @@ on:
     branches:
       - 'master'
       - 'releases/v*'
-    paths-ignore:
-      - '**.md'
   pull_request:
     branches:
       - 'master'
-    paths-ignore:
-      - '**.md'
+      - 'releases/v*'
 
 jobs:
   test:
@@ -21,11 +18,15 @@ jobs:
         name: Checkout
         uses: actions/checkout@v2
       -
-        name: Install
-        run: yarn install
+        name: Validate
+        uses: docker/bake-action@v1
+        with:
+          targets: validate
       -
         name: Test
-        run: yarn run test
+        uses: docker/bake-action@v1
+        with:
+          targets: test
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       -
diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
deleted file mode 100644
index 0134e68..0000000
--- a/.github/workflows/validate.yml
+++ /dev/null
@@ -1,25 +0,0 @@
-name: validate
-
-on:
-  push:
-    branches:
-      - 'master'
-      - 'releases/v*'
-    paths-ignore:
-      - '**.md'
-  pull_request:
-    branches:
-      - 'master'
-    paths-ignore:
-      - '**.md'
-
-jobs:
-  validate:
-    runs-on: ubuntu-latest
-    steps:
-      -
-        name: Checkout
-        uses: actions/checkout@v2
-      -
-        name: Validate
-        run: docker buildx bake validate
diff --git a/Dockerfile.dev b/Dockerfile.dev
deleted file mode 100644
index cc1be75..0000000
--- a/Dockerfile.dev
+++ /dev/null
@@ -1,54 +0,0 @@
-#syntax=docker/dockerfile:1.2
-
-FROM node:12 AS deps
-WORKDIR /src
-COPY package.json yarn.lock ./
-RUN --mount=type=cache,target=/src/node_modules \
-  yarn install
-
-FROM scratch AS update-yarn
-COPY --from=deps /src/yarn.lock /
-
-FROM deps AS validate-yarn
-COPY .git .git
-RUN status=$(git status --porcelain -- yarn.lock); if [ -n "$status" ]; then echo $status; exit 1; fi
-
-FROM deps AS base
-COPY . .
-
-FROM base AS build
-RUN --mount=type=cache,target=/src/node_modules \
-  yarn build
-
-#FROM deps AS test
-#ARG GITHUB_REPOSITORY
-#ENV RUNNER_TEMP=/tmp/github_runner
-#ENV RUNNER_TOOL_CACHE=/tmp/github_tool_cache
-#ENV GITHUB_REPOSITORY=${GITHUB_REPOSITORY}
-#COPY . .
-#RUN --mount=type=cache,target=/src/node_modules \
-#  --mount=type=secret,id=github_token \
-#  GITHUB_TOKEN=$(cat /run/secrets/github_token) env|sort && yarn run test
-#
-#FROM scratch AS test-coverage
-#COPY --from=test /src/coverage /coverage/
-
-FROM base AS run-format
-RUN --mount=type=cache,target=/src/node_modules \
-  yarn run format
-
-FROM scratch AS format
-COPY --from=run-format /src/src/*.ts /src/
-
-FROM base AS validate-format
-RUN --mount=type=cache,target=/src/node_modules \
-  yarn run format-check
-
-FROM scratch AS dist
-COPY --from=build /src/dist/ /dist/
-
-FROM build AS validate-build
-RUN status=$(git status --porcelain -- dist); if [ -n "$status" ]; then echo $status; exit 1; fi
-
-FROM base AS dev
-ENTRYPOINT ["bash"]
diff --git a/docker-bake.hcl b/docker-bake.hcl
index 6c397f3..66d73f5 100644
--- a/docker-bake.hcl
+++ b/docker-bake.hcl
@@ -1,62 +1,77 @@
 variable "GITHUB_REPOSITORY" {
   default = "crazy-max/ghaction-github-labeler"
 }
+variable "NODE_VERSION" {
+  default = "12"
+}
+
+target "_common" {
+  args = {
+    NODE_VERSION = NODE_VERSION
+    GITHUB_REPOSITORY = GITHUB_REPOSITORY
+  }
+}
 
 group "default" {
   targets = ["build"]
 }
 
 group "pre-checkin" {
-  targets = ["update-yarn", "format", "build"]
+  targets = ["vendor-update", "format", "build"]
 }
 
 group "validate" {
-  targets = ["validate-format", "validate-build", "validate-yarn"]
+  targets = ["vendor-validate", "format-validate", "build-validate"]
 }
 
-target "dockerfile" {
-  dockerfile = "Dockerfile.dev"
+target "vendor-update" {
+  inherits = ["_common"]
+  dockerfile = "./hack/build.Dockerfile"
+  target = "vendor-update"
+  output = ["."]
 }
 
-target "update-yarn" {
-  inherits = ["dockerfile"]
-  target = "update-yarn"
-  output = ["."]
+target "vendor-validate" {
+  inherits = ["_common"]
+  dockerfile = "./hack/build.Dockerfile"
+  target = "vendor-validate"
 }
 
 target "build" {
-  inherits = ["dockerfile"]
-  target = "dist"
+  inherits = ["_common"]
+  dockerfile = "./hack/build.Dockerfile"
+  target = "build-update"
   output = ["."]
 }
 
-//target "test" {
-//  args = {
-//    GITHUB_REPOSITORY = "${GITHUB_REPOSITORY}"
-//  }
-//  inherits = ["dockerfile"]
-//  secret = ["id=github_token,src=.dev/.ghtoken"]
-//  target = "test-coverage"
-//  output = ["."]
-//}
+target "build-validate" {
+  inherits = ["_common"]
+  dockerfile = "./hack/build.Dockerfile"
+  target = "build-validate"
+}
 
 target "format" {
-  inherits = ["dockerfile"]
-  target = "format"
+  inherits = ["_common"]
+  dockerfile = "./hack/build.Dockerfile"
+  target = "format-update"
   output = ["."]
 }
 
-target "validate-format" {
-  inherits = ["dockerfile"]
-  target = "validate-format"
+target "format-validate" {
+  inherits = ["_common"]
+  dockerfile = "./hack/build.Dockerfile"
+  target = "format-validate"
 }
 
-target "validate-build" {
-  inherits = ["dockerfile"]
-  target = "validate-build"
+target "test" {
+  inherits = ["_common"]
+  dockerfile = "./hack/test.Dockerfile"
+  secret = ["id=GITHUB_TOKEN,env=GITHUB_TOKEN"]
+  target = "test-coverage"
+  output = ["./coverage"]
 }
 
-target "validate-yarn" {
-  inherits = ["dockerfile"]
-  target = "validate-yarn"
+target "test-local" {
+  inherits = ["test"]
+  secret = ["id=GITHUB_TOKEN,src=.dev/.ghtoken"]
 }
diff --git a/hack/build.Dockerfile b/hack/build.Dockerfile
new file mode 100644
index 0000000..742a14d
--- /dev/null
+++ b/hack/build.Dockerfile
@@ -0,0 +1,54 @@
+# syntax=docker/dockerfile:1.3
+ARG NODE_VERSION
+
+FROM node:${NODE_VERSION}-alpine AS base
+RUN apk add --no-cache cpio findutils git
+WORKDIR /src
+
+FROM base AS deps
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/node_modules \
+  yarn install && mkdir /vendor && cp yarn.lock /vendor
+
+FROM scratch AS vendor-update
+COPY --from=deps /vendor /
+
+FROM deps AS vendor-validate
+RUN --mount=type=bind,target=.,rw \
+  git add -A && cp -rf /out/* .; \
+  if [ -n "$(git status --porcelain -- yarn.lock)" ]; then \
+    echo >&2 'ERROR: Vendor result differs. Please vendor your package with "docker buildx bake vendor-update"'; \
+    git status --porcelain -- yarn.lock; \
+    exit 1; \
+  fi
+
+FROM deps AS build
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/node_modules \
+  yarn run build && mkdir /out && cp -Rf dist /out/
+
+FROM scratch AS build-update
+COPY --from=build /out /
+
+FROM build AS build-validate
+RUN --mount=type=bind,target=.,rw \
+  git add -A && cp -rf /out/* .; \
+  if [ -n "$(git status --porcelain -- dist)" ]; then \
+    echo >&2 'ERROR: Build result differs. Please build first with "docker buildx bake build"'; \
+    git status --porcelain -- dist; \
+    exit 1; \
+  fi
+
+FROM deps AS format
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/node_modules \
+  yarn run format \
+  && mkdir /out && find . -name '*.ts' -not -path './node_modules/*' | cpio -pdm /out
+
+FROM scratch AS format-update
+COPY --from=format /out /
+
+FROM deps AS format-validate
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/node_modules \
+  yarn run format-check \
diff --git a/hack/test.Dockerfile b/hack/test.Dockerfile
new file mode 100644
index 0000000..b02f1c2
--- /dev/null
+++ b/hack/test.Dockerfile
@@ -0,0 +1,25 @@
+# syntax=docker/dockerfile:1.3
+ARG NODE_VERSION
+ARG GITHUB_REPOSITORY
+
+FROM node:${NODE_VERSION}-alpine AS base
+RUN apk add --no-cache git
+WORKDIR /src
+
+FROM base AS deps
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/node_modules \
+  yarn install
+
+FROM deps AS test
+ENV RUNNER_TEMP=/tmp/github_runner
+ENV RUNNER_TOOL_CACHE=/tmp/github_tool_cache
+ARG GITHUB_REPOSITORY
+ENV GITHUB_REPOSITORY=${GITHUB_REPOSITORY}
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/node_modules \
+  --mount=type=secret,id=GITHUB_TOKEN \
+  GITHUB_TOKEN=$(cat /run/secrets/GITHUB_TOKEN) yarn run test --coverageDirectory=/tmp/coverage
+
+FROM scratch AS test-coverage
+COPY --from=test /tmp/coverage /