fix(workflows): move polaris action in repo and fix for v4

.github/actions/setup-polaris/Dockerfile

@@ -0,0 +1,13 @@
+FROM alpine:3.14
+
+RUN	apk add --no-cache \
+  bash \
+  ca-certificates \
+  curl \
+  wget \
+  tar \
+  jq
+
+COPY entrypoint.sh /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]

.github/actions/setup-polaris/action.yaml

@@ -0,0 +1,22 @@
+name: 'Install polaris'
+description: 'Download a specific polaris version'
+
+inputs:
+  version:
+    description: 'version of polaris'
+    required: true
+    default: 'latest'
+
+runs:
+  using: 'docker'
+  image: './Dockerfile'
+  args:
+    - ${{ inputs.version }}
+
+outputs:
+  version:
+    description: 'Version of polaris installed'
+
+branding:
+  icon: 'download-cloud'
+  color: 'gray-dark'

.github/actions/setup-polaris/entrypoint.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+if [[ -z "$INPUT_VERSION" ]]; then
+  echo "Missing polaris version information"
+  exit 1
+fi
+polaris version | grep "$INPUT_VERSION" &> /dev/null
+if [ $? == 0 ]; then
+   echo "Polaris $INPUT_VERSION is already installed! Exiting gracefully."
+   exit 0
+else
+  echo "Installing polaris to path."
+fi
+TARGET_FILE="polaris.tar.gz"
+curl -LJ -vvv -o $TARGET_FILE 'https://github.com/FairwindsOps/polaris/releases/download/'"$INPUT_VERSION"'/polaris_linux_amd64.tar.gz'
+mkdir polaris
+tar -xzf $TARGET_FILE -C polaris
+rm $TARGET_FILE
+echo "polaris" >> $GITHUB_PATH
+echo "::set-output name=version::$INPUT_VERSION"

.github/workflows/release.yml

@@ -25,9 +25,9 @@ jobs:
           version: v3.4.0
 
       - name: Install Polaris
-        uses: fairwindsops/polaris/.github/actions/setup-polaris@master
+        uses: .github/actions/setup-polaris
         with:
-          version: 3.2.1
+          version: 4.0.7
 
       - name: Polaris Audit
         run: |