Switch CI to Github Actions

.github/workflows/Dockerfile.lint

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+FROM fpco/pid1:18.04
+
+# Install required Ubuntu packages
+RUN apt-get update \
+ && apt-get install -y --no-install-recommends \
+     ca-certificates \
+     curl \
+     unzip \
+ && apt-get clean  \
+ && rm -rf /var/lib/apt/lists/*
+
+# Install Terraform
+ARG TERRAFORM_VERSION=0.12.24
+RUN curl -Lo terraform.zip https://releases.hashicorp.com/terraform/${TERRAFORM_VERSION}/terraform_${TERRAFORM_VERSION}_linux_amd64.zip \
+ && unzip terraform.zip -d /usr/local/bin \
+ && terraform --version
+
+# Install Terraform Lint TFLint
+ARG TFLINT_VERSION=v0.9.1
+RUN curl -Lo tflint.zip https://github.com/wata727/tflint/releases/download/${TFLINT_VERSION}/tflint_linux_amd64.zip \
+ && unzip tflint.zip -d /usr/local/bin  \
+ && tflint --version

.github/workflows/lint-image.yml

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+name: Build lint image
+
+on:
+  push:
+    branches: [lint-image]
+
+jobs:
+  push:
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push'
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Log into Github registry
+        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login docker.pkg.github.com -u ${{ github.actor }} --password-stdin
+
+      - name: Build lint image
+        run: |
+          IMAGE_ID=docker.pkg.github.com/${{ github.repository }}/lint:$GITHUB_SHA
+          docker build .github/workflows -f .github/workflows/Dockerfile.lint --tag $IMAGE_ID
+          docker push $IMAGE_ID
+          echo Pushed new lint image $IMAGE_ID

.github/workflows/lint.yml

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+name: Lint
+
+on: [push, pull_request]
+
+jobs:
+  push:
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push'
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Log into Github registry
+        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login docker.pkg.github.com -u ${{ github.actor }} --password-stdin
+
+      - name: Lint
+        run: |
+            docker run -v $(pwd):/src --rm docker.pkg.github.com/fpco/terraform-aws-foundation/lint:bdae808b0d523c6f93c4c477c87924875f0ec0a4 bash -c "cd /src && bash ./scripts/ci/tfinit.sh && bash ./scripts/ci/tflint.sh"