docs: add README [skip ci]

Author: xhofe

README.md

@@ -1,2 +1,84 @@
 # docker-actions
+
+[![Test Actions](https://github.com/go-cross/docker-actions/actions/workflows/test-actions.yml/badge.svg)](https://github.com/go-cross/docker-actions/actions/workflows/test-actions.yml)
+
 Build golang program with CGO_ENABLED=1 for docker Image
+
+### Usage Example
+
+```yml
+name: Docker Actions
+
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: read
+
+jobs:
+  test-action:
+    name: GitHub Actions Test
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        id: checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.22'
+
+      - name: Build docker binary
+        id: docker-build
+        uses: go-cross/docker-actions@v1
+        with:
+          platforms: linux/386,linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64,linux/ppc64le,linux/riscv64,linux/s390x
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: xhofe/test
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build and push
+        id: docker_build
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: ./example/Dockerfile
+          push: false
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          platforms: ${{ steps.docker-build.outputs.platforms }}
+```
+
+Sure, here are the inputs and outputs in table format:
+
+## Inputs
+
+| Input     | Description                               | Required | Default Value                                                                                         |
+| --------- | ----------------------------------------- | -------- | ----------------------------------------------------------------------------------------------------- |
+| platforms | The platforms to build for                | No       | 'linux/386,linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64,linux/ppc64le,linux/riscv64,linux/s390x' |
+| dir       | The directory to work                     | No       | '.'                                                                                                   |
+| packages  | The packages to build                     | No       | '.'                                                                                                   |
+| flags     | The flags to pass to the go build command | No       | '-ldflags=-w -s'                                                                                      |
+| output    | The output binary name                    | No       | '$repo'                                                                                               |
+
+## Outputs
+
+| Output    | Description             |
+| --------- | ----------------------- |
+| platforms | The platforms built for |