chore: Update instructions for Terraforming infra and pin some dependencies

.dockerignore

@@ -6,3 +6,6 @@ secret-*.yaml
 target/
 !target/release/dino-park-packs
 **/.terraform/*
+terraform/**/plan
+terraform/**/.tool-versions
+.envrc

.gitignore

@@ -5,3 +5,4 @@
 .dev.env
 secret-*.yaml
 .terraform
+terraform/**/plan

terraform/INFRA.md

@@ -6,3 +6,40 @@ psql -U dinopark -W oneTimePassword -h XXX.rds.amazonaws.com postgres
 alter user dinopark with encrypted password 'XXX';
 create database "dino-park-packs";
 ```
+
+### Setting up Terraform on an ARM Mac
+
+New developers at Mozilla are issued an ARM-based Mac, and so the installation
+steps will be different.
+
+To get started, install Terraform (using [asdf](https://asdf-vm.com/)):
+
+```
+ASDF_HASHICORP_OVERWRITE_ARCH=amd64 asdf install terraform 0.12.31
+```
+
+Next, you'll need to export your credentials:
+
+```
+$(aws configure export-credentials --format env --profile iam-admin)
+```
+
+(Consider using something like [direnv](https://direnv.net/).)
+
+Next, initialize the working directory:
+
+```
+arch -arch x86_64 terraform init
+```
+
+And then, finally, when you're ready, generate a plan:
+
+```
+arch -arch x86_64 terraform plan -out plan
+```
+
+Once you're ready, you can ship your changes using:
+
+```
+arch -arch x86_64 terraform apply plan
+```

terraform/codebuild/.tool-versions

@@ -0,0 +1 @@
+terraform 0.12.31

terraform/codebuild/provider.tf

@@ -8,6 +8,11 @@ provider "aws" {
 
 terraform {
   required_version = "~> 0.12"
+  required_providers {
+    aws = {
+      version = "~> 2.62.0"
+    }
+  }
 
   backend "s3" {
     bucket = "eks-terraform-shared-state"

terraform/dev/.tool-versions

@@ -0,0 +1 @@
+terraform 0.12.31

terraform/dev/provider.tf

@@ -8,6 +8,11 @@ provider "aws" {
 
 terraform {
   required_version = "~> 0.12"
+  required_providers {
+    aws = {
+      version = "~> 2.62.0"
+    }
+  }
 
   backend "s3" {
     bucket = "eks-terraform-shared-state"

terraform/prod/.tool-versions

@@ -0,0 +1 @@
+terraform 0.12.31

terraform/prod/provider.tf

@@ -8,6 +8,11 @@ provider "aws" {
 
 terraform {
   required_version = "~> 0.12"
+  required_providers {
+    aws = {
+      version = "~> 2.62.0"
+    }
+  }
 
   backend "s3" {
     bucket = "eks-terraform-shared-state"

terraform/test/.tool-versions

@@ -0,0 +1 @@
+terraform 0.12.31

terraform/test/provider.tf

@@ -8,6 +8,11 @@ provider "aws" {
 
 terraform {
   required_version = "~> 0.12"
+  required_providers {
+    aws = {
+      version = "~> 2.62.0"
+    }
+  }
 
   backend "s3" {
     bucket = "eks-terraform-shared-state"