feature #3 - add rule to scheduled job

terraform/event-bridge.tf

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+resource "aws_cloudwatch_event_bus" "exchange_rate_bus" {
+  name = "exchange-rate-bus"
+}

terraform/event-rule.tf

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+resource "aws_cloudwatch_event_rule" "update_exchange_rate_rule" {
+  name = "update-exchange-rate-rule"
+  event_bus_name = aws_cloudwatch_event_bus.exchange_rate_bus.name
+  description = "update exchange rate rule"
+  schedule_expression = "rate(1 minute)" # Could be replaced to 1 minute or less
+}

terraform/event-target.tf

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+resource "aws_cloudwatch_event_target" "update_exchange_rate_sqs_target" {
+  arn = aws_sqs_queue.update-exchange-rate-queue.arn
+  event_bus_name = aws_cloudwatch_event_bus.exchange_rate_bus.name
+  rule = aws_cloudwatch_event_rule.update_exchange_rate_rule.name
+}