Add .gitignore files

.gitignore

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+# Ignore Terraform lock files
+# As of Feb 2023, Terraform lock files, while well intentioned, have a tendency
+# to get into a confusing state that requires recreating the lock file, which 
+# defeats the purpose. Moreover, lock files are per environment, which can make
+# it difficult for people to upgrade dependencies (e.g. upgrade an AWS provider)
+# across environments if certain environments are locked down (e.g. production).
+.terraform.lock.hcl
+
+# MacOS files
+.DS_Store
+
+# Ignore develop-specific VS code settings files
+.vscode
+
+# Ignore local environment variables which can contain environment secrets
+.env
+.envrc
+
+# Python testing stuff
+*__pycache__*

infra/.gitignore

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+# Local .terraform metadata
+**/.terraform/*
+
+# .tfstate files
+*.tfstate
+*.tfstate.*
+
+# Crash log files
+crash.log
+
+# Ignore override files as they are usually used to override resources locally and so
+# are not checked in
+override.tf
+override.tf.json
+*_override.tf
+*_override.tf.json
+
+# Include override files you do wish to add to version control using negated pattern
+#
+# !example_override.tf
+
+# Include tfplan files to ignore the plan output of command: terraform plan -out=tfplan
+# example: *tfplan*
+*.plan
+*.tfstate