feat: opentofu agent binary

Author: sijo5722-2021

Dockerfile

@@ -1,5 +1,6 @@
 FROM ubuntu:20.04
 ARG TERRAFORM_VERSION=1.3.2
+ARG OPENTOFU_VERSION=1.6.2
 ARG TERRAGRUNT_VERSION=0.57.0
 ARG VAULT_VERSION=1.17.6
 ARG YTT_VERSION=0.48.0
@@ -32,6 +33,9 @@ RUN apt-get update && apt install curl gnupg software-properties-common -y && ad
 RUN wget -q https://releases.hashicorp.com/terraform/${TERRAFORM_VERSION}/terraform_${TERRAFORM_VERSION}_linux_amd64.zip -O /tmp/terraform_${TERRAFORM_VERSION}_linux_amd64.zip \
     && unzip /tmp/terraform_${TERRAFORM_VERSION}_linux_amd64.zip -d /bin/ \
     && rm /tmp/terraform_${TERRAFORM_VERSION}_linux_amd64.zip
+RUN wget -q https://github.com/opentofu/opentofu/releases/download/v${OPENTOFU_VERSION}/tofu_${OPENTOFU_VERSION}_linux_amd64.zip -O /tmp/tofu_${OPENTOFU_VERSION}_linux_amd64.zip \
+    && unzip /tmp/tofu_${OPENTOFU_VERSION}_linux_amd64.zip -d /bin/ \
+    && rm /tmp/tofu_${OPENTOFU_VERSION}_linux_amd64.zip
 RUN wget -q https://github.com/gruntwork-io/terragrunt/releases/download/v${TERRAGRUNT_VERSION}/terragrunt_linux_amd64 -O /bin/terragrunt \
     && chmod +x /bin/terragrunt
 RUN wget -q https://releases.hashicorp.com/vault/${VAULT_VERSION}/vault_${VAULT_VERSION}_linux_amd64.zip -O /tmp/vault_${VAULT_VERSION}_linux_amd64.zip \
@@ -46,6 +50,9 @@ RUN wget -q https://github.com/carvel-dev/kapp/releases/download/v${KAPP_VERSION
 RUN wget -q https://storage.googleapis.com/kubernetes-release/release/v${KUBECTL_VERSION}/bin/linux/amd64/kubectl -O /bin/kubectl \
     && chmod +x /bin/kubectl
 
+# Set Terragrunt to use OpenTofu instead of Terraform
+ENV TERRAGRUNT_TFPATH=/bin/tofu
+
 RUN pip3 install --upgrade pip \
     && mkdir /workdir && cd /workdir \
     && mkdir keys \