Update to PreTeXt project source.

Author: fragandi

source/ch-M2.ptx

@@ -6,7 +6,7 @@
 This chapter is co-authored by Francesca Gandini, Sumner Strom, Al Ashir Intisar
         </p>
     </introduction>
-    <section xml:id="sec-template">
+    <!-- <section xml:id="sec-template">
         <title>Template </title>
         <p>
             This is the introduction to the template.
@@ -18,7 +18,12 @@ This chapter is co-authored by Francesca Gandini, Sumner Strom, Al Ashir Intisar
             </p>
             
         </subsection>
-    <subsection xml:id="subsec-notes">
+    </section> -->
+    
+        <section xml:id="sec-notes">
+            <title>Notes</title>
+            
+            <subsection xml:id="subsec-notes">
             <title>Notes Subsection</title>
             <p>
                 To build in pretext use the template subsection and pretext environment features.

source/ch-projects.ptx

@@ -37,6 +37,18 @@ up and writing quickly, and helps them share their works on
 GitHub and GitHub Pages.
         </p>
     </section>
+
+    <section xml:id="sec-latex-codespace">
+        <title>Creating a LaTeX Codespace</title>
+        
+        <p>
+            A turn-key repository for creating a Codespace 
+            (<xref ref="sec-codespaces"/>) with a standard LaTeX installation can be found at
+            <url href="https://github.com/fragandi/latex-codespace">
+                fragandi/latex-codespace
+            </url>. To start a LaTeX codespace follow directly the README in the repo.
+        </p>
+    </section>
     <section xml:id="sec-pi-base">
         <title>
 <m>\pi</m>-Base Community Database of Topological Counterexamples

source/main.ptx

@@ -25,8 +25,8 @@
     <xi:include href="ch-collaboration.ptx"/>
     <xi:include href="ch-jupyter.ptx"/>
     <xi:include href="ch-projects.ptx"/>
-    <xi:include href="ch-manim.ptx"/>
-    <xi:include href="ch-latex.ptx"/>
+    <!-- <xi:include href="ch-manim.ptx"/> -->
+    <!-- <xi:include href="ch-latex.ptx"/> -->
     <xi:include href="ch-M2.ptx"/>
 
     <backmatter xml:id="backmatter">