Meteor: import markdown from file

I've installed markdown package on Meteor:

meteor add markdown

And test it successfully:

<body>
  {{#markdown}}
     #Hello world!#
  {{/markdown}}
</body>

Ok!
Now I would like to import a markdown from a file and I had try in this way:

if (Meteor.isClient) {
  Session.set("markdown_data","MDFile.md");

  Template.myTemplate.helpers({
    markdown_data: function() {
      return Session.get("markdown_data");
    }
  });
}

And in html:

<body>
  {{#markdown}}{{{markdown_data}}}{{/markdown}}
</body>

But nothing appears, neither on webpage or in web-console or terminal.

Where I'm wrong?

Update - working Code

if (Meteor.isClient) {

  Markdown = new Mongo.Collection("markdown");
  
  Template.myTemplate.helpers({
    markdown_data: function() {
      var markdown = Markdown.findOne();
      return markdown && markdown.data;
    }
  });

 }

if (Meteor.isServer) {
    Markdown = new Mongo.Collection("markdown");
    Meteor.startup(function () {
      if(Markdown.find().count()===0){
        Markdown.insert({
               data: Assets.getText("teamProgramming.md")
        });
      }
  });
}

Solution

It's not going to work this way, you should put your markdown file under the private directory, load it as an asset server-side and send it to the client using a collection :

private/MDFile.md

#Hello world!#

lib/collections/markdown.js

Markdown=new Mongo.Collection("markdown");

server/startup.js

Meteor.startup(function(){
  if(Markdown.find().count()===0){
    Markdown.insert({
      data: Assets.getText("MDFile.md");
    });
  }
});

server/collections/markdown.js

Meteor.publish(function(){
  return Markdown.find();
});

client/views/main.html

<body>
  {{#markdown}}
    {{markdownData}}
  {{/markdown}}
</body>

client/views/main.js

Template.body.helpers({
  markdownData:function(){
    var markdown=Markdown.findOne();
    return markdown && markdown.data;
  }
});