main.tf

...

resource "aws_vpc" "main-{{ name }}" {
  cidr_block = "172.26.0.0/16"

  enable_dns_hostnames = true

  enable_dns_support = true

  tags = {
    Name = "{{ name }}"
  }
}

resource "aws_subnet" "main-{{ name }}" {
  cidr_block = "${cidrsubnet(aws_vpc.main-{{ name }}.cidr_block, 3, 1)}"

  vpc_id = "${aws_vpc.main-{{ name }}.id}"

  availability_zone = var.zone

  map_public_ip_on_launch = true
}

resource "aws_internet_gateway" "main-{{ name }}" {
  vpc_id = "${aws_vpc.main-{{ name }}.id}"

  tags = {
    Name = "{{ name }}"
  }
}

resource "aws_route_table" "main-{{ name }}" {
  vpc_id = "${aws_vpc.main-{{ name }}.id}"

  route {
    cidr_block = "0.0.0.0/0"
    gateway_id = "${aws_internet_gateway.main-{{ name }}.id}"
  }

  tags = {
    Name = "{{ name }}"
  }
}