Automate build and publish steps (#2)

* Automate build and publish steps

Automate build and publish steps for image

* Update README.md

.github/workflows/build.yml

@@ -0,0 +1,40 @@
+# yamllint disable rule:line-length
+---
+name: Build
+
+# yamllint disable-line rule:truthy
+on:
+  workflow_dispatch:
+
+jobs:
+  protoc:
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+      contents: write
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Set up QEMU
+        id: qemu
+        uses: docker/setup-qemu-action@v1
+        with:
+          image: tonistiigi/binfmt:latest
+          platforms: linux/amd64,linux/arm64
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and Publish
+        run: ./publish.sh

README.md

@@ -10,11 +10,10 @@ docker run \
   --env WORKATO_API_TOKEN="my-token" \
   -v $(pwd):/usr/src/connector \
   --workdir /usr/src/connector \
-  ghcr.io/safetyculture/workato-connector-sdk:0.3.0
+  ghcr.io/safetyculture/workato-connector-sdk:latest
   help
 ```
 
 ## Updating
 
-1. Update the version in `WORAKTO_SDK_VERSION.txt`.
-2. Run `./build.sh && docker push ghcr.io/safetyculture/workato-connector-sdk:$(cat WORAKTO_SDK_VERSION.txt)`
+Manually trigger the GitHub action to recreate the image with the latest version of the gem.

publish.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+set -e
+
+REPOSITORY="ghcr.io/safetyculture"
+PLATFORM="linux/amd64,linux/arm64"
+
+WORKATO_SDK_VERSION=$(curl https://api.github.com/repos/workato/workato-connector-sdk/releases/latest | jq -r '.tag_name' | sed -r 's/v//g')
+
+docker buildx build \
+  --platform "$PLATFORM" \
+  --build-arg WORKATO_SDK_VERSION="$WORKATO_SDK_VERSION" \
+  . \
+  -t "$REPOSITORY/workato-connector-sdk:$WORKATO_SDK_VERSION" \
+  -t "$REPOSITORY/workato-connector-sdk:latest"