add character limit to tags (#15)

Author: Rekkice

modules/atomvm/examples/tagboard/js/board.js

@@ -126,7 +126,7 @@ export class TagBoard extends LitElement {
 
       <div class="tags">${this.renderTags(this._tags)}</div>
       <form @submit=${this.onTagSubmit}>
-        <input placeholder="Mensaje" @input=${this.onTagInput} .value=${this._content} />
+        <input placeholder="Mensaje" @input=${this.onTagInput} .value=${this._content} maxlength="70" />
         <button>Enviar</button>
       </form>
       `

modules/atomvm/examples/tagboard/lib/tag_board_store.ex

@@ -7,7 +7,12 @@ defmodule TagBoard.Store do
   def add_tag(author, content, timestamp) do
     case read_tags_from_nvs() do
       {:ok, current_tags} ->
-        new_tag = %{id: timestamp, author: author, content: content, timestamp: timestamp}
+        new_tag = %{
+          id: timestamp,
+          author: author,
+          content: :string.slice(content, 0, 70),
+          timestamp: timestamp
+        }
 
         updated_tags = [new_tag | current_tags]