Sending plain text, would like to send gemtext

#!/usr/bin/python3
import os
from random import randint

#for param in os.environ.keys():  #os.environ[QUERY_STRING]
#   print ("%20s: %s" % (param, os.environ[param]))

sections_dict = {
  "1": {
         "title":"Pines in the mist", 
         "text":"""
Halloween, 2013, you're lost in a pine woods somewhere north of Tejeda, in the center of Gran Canaria. The ground is hard, and the trees and the unusual cold mist doesn't allow you to look far away. Oh, yes, the smartphone chose this moment to die.

It's getting late, thankfully there's an abandoned cave home nearby.
""",
          "options":[
             {
               "text":"Get in the cave",
               "link":"2",
               "alt-link":"2",
               "dif":0
             },
             {
               "text":"Press on, it's a small island",
               "link":"3",
               "alt-link":"4",
               "dif":3
             }
             ]
        },
  "2": { 
          "title":"The cave",
          "text":"""
That was a good idea, the cave keeps you well
protected through the night. It won't be nice, but you'll make it. 
""",
          "options": [],
      },
  "3": { 
          "title":"Lucky you!",
          "text":"""
You shouldn't have went on, not on a night like this, but you went lucky and you made it to the road where a couple of cops helped you out.
""",
          "options": [],
      },
  "4": { 
          "title":"Unlucky you!",
          "text":"""
You shouldn't have went on, not on a night like this, this island is full of very steep slopes, sometimes suddenly so and without warning. You fell into the abyss.
""",
          "options": [],
      },
  "intro": { 
          "title":"Introduction",
          "text":"""
This is a short and simple gamebook, comprising 4 sections. Its main purpose is to teach myself how to do interactive fiction on Gemini.

It won't be obvious to you, but the server will be “rolling dice” and loading the relevant section.

That said, it's easy to play, just follow the links
""",
          "options": [{
               "text":"Start the game",
               "link":"1",
               "alt-link":"1",
               "dif":0
             }],
      },
}

def show_section(section):
  print("# Urney.xyz - First Story")
  print("## ", section["title"])
  print(section["text"])
  if len(section["options"]) > 0:
    print("### Options")
    for option in section["options"]:
      dice = randint(1,6)
      if dice > option["dif"]:
        link = "alt-link"
      else:
        link = "link"
      print("=> gemini://urney.xyz/first?" + option[link],  option["text"])
  else:
    print("### The End")
  print("---")

section_id = os.environ.get("QUERY_STRING")

if section_id:
  show_section(sections_dict[section_id])
else:
  show_section(sections_dict["intro"])
#print(os.environ["QUERY_STRING"])

print("20 text/gemini\r")