diff --git a/book/external/deploy-book-workflow b/book/external/deploy-book-workflow
index 53562ea..081491b 160000
--- a/book/external/deploy-book-workflow
+++ b/book/external/deploy-book-workflow
@@ -1 +1 @@
-Subproject commit 53562ea342ea85116b1dfdbe23c59dc85dd2e394
+Subproject commit 081491b5f7bd0beecb5663228eaf5ab80b9dd57c
diff --git a/book/external/template b/book/external/template
index a9aaa00..2d5513d 160000
--- a/book/external/template
+++ b/book/external/template
@@ -1 +1 @@
-Subproject commit a9aaa006b24957d5e913ca52272eede5cc7f2e79
+Subproject commit 2d5513da0a53b606f870890237ef4417dc18b398
diff --git a/book/intro.md b/book/intro.md
index 290839f..b1ff072 100644
--- a/book/intro.md
+++ b/book/intro.md
@@ -3,6 +3,11 @@
 This is an introduction to Git, VS Code and Jupyter Books for teachers and teaching assistants involved in TeachBooks, our platform easing the process of making a <a href="https://jupyterbook.org/"><img  style="display:inline-block; height:1.5em; width:auto; transform:translate(0, -0.15em)" src="images/logo-wide.svg" alt="Jupyter book"></a>. This book is still work in progress, so feel free to contribute https://gitlab.tudelft.nl/interactivetextbooks-citg/jupyter-book-manual! For more information about teachbooks, visit [https://teachbooks.tudelft.nl/](https://teachbooks.tudelft.nl/).
 
 ## Contact
-If you encounter any issues and you've a TU Delft account, report it by clicking  <svg class="svg-inline--fa fa-gitlab" aria-hidden="true" focusable="false" data-prefix="fab" data-icon="gitlab" role="img" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" data-fa-i2svg=""><path fill="currentColor" d="M503.5 204.6L502.8 202.8L433.1 21.02C431.7 17.45 429.2 14.43 425.9 12.38C423.5 10.83 420.8 9.865 417.9 9.57C415 9.275 412.2 9.653 409.5 10.68C406.8 11.7 404.4 13.34 402.4 15.46C400.5 17.58 399.1 20.13 398.3 22.9L351.3 166.9H160.8L113.7 22.9C112.9 20.13 111.5 17.59 109.6 15.47C107.6 13.35 105.2 11.72 102.5 10.7C99.86 9.675 96.98 9.295 94.12 9.587C91.26 9.878 88.51 10.83 86.08 12.38C82.84 14.43 80.33 17.45 78.92 21.02L9.267 202.8L8.543 204.6C-1.484 230.8-2.72 259.6 5.023 286.6C12.77 313.5 29.07 337.3 51.47 354.2L51.74 354.4L52.33 354.8L158.3 434.3L210.9 474L242.9 498.2C246.6 500.1 251.2 502.5 255.9 502.5C260.6 502.5 265.2 500.1 268.9 498.2L300.9 474L353.5 434.3L460.2 354.4L460.5 354.1C482.9 337.2 499.2 313.5 506.1 286.6C514.7 259.6 513.5 230.8 503.5 204.6z"></path></svg> --> {fa}`lightbulb` on the top right corner of this page. Or contribute directly by creating a merge request in the [repository](https://gitlab.tudelft.nl/interactivetextbooks-citg/jupyter-book-manual).
+If you encounter any issues and you have a TU Delft account, report it by clicking  <svg class="svg-inline--fa fa-gitlab" aria-hidden="true" focusable="false" data-prefix="fab" data-icon="gitlab" role="img" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" data-fa-i2svg=""><path fill="currentColor" d="M503.5 204.6L502.8 202.8L433.1 21.02C431.7 17.45 429.2 14.43 425.9 12.38C423.5 10.83 420.8 9.865 417.9 9.57C415 9.275 412.2 9.653 409.5 10.68C406.8 11.7 404.4 13.34 402.4 15.46C400.5 17.58 399.1 20.13 398.3 22.9L351.3 166.9H160.8L113.7 22.9C112.9 20.13 111.5 17.59 109.6 15.47C107.6 13.35 105.2 11.72 102.5 10.7C99.86 9.675 96.98 9.295 94.12 9.587C91.26 9.878 88.51 10.83 86.08 12.38C82.84 14.43 80.33 17.45 78.92 21.02L9.267 202.8L8.543 204.6C-1.484 230.8-2.72 259.6 5.023 286.6C12.77 313.5 29.07 337.3 51.47 354.2L51.74 354.4L52.33 354.8L158.3 434.3L210.9 474L242.9 498.2C246.6 500.1 251.2 502.5 255.9 502.5C260.6 502.5 265.2 500.1 268.9 498.2L300.9 474L353.5 434.3L460.2 354.4L460.5 354.1C482.9 337.2 499.2 313.5 506.1 286.6C514.7 259.6 513.5 230.8 503.5 204.6z"></path></svg> --> {fa}`lightbulb` on the top right corner of this page. Or contribute directly by creating a merge request in the [repository](https://gitlab.tudelft.nl/interactivetextbooks-citg/jupyter-book-manual).
 
-If you've questions, contact Tom van Woudenberg, Robert Lanzafame or our TAs Julie Kirsch at TeachBooks@tudelft.nl, also for non-TU Delft account holders. TU Delft account holder can also contact us in the [MS Teams Open Interactive Textbooks Community](https://teams.microsoft.com/l/team/19%3Ah9-uRcP_yYauh-VuoPFozJVUvHVOB4a0mz1ZWvh4q4Q1%40thread.tacv2/conversations?groupId=3e88c1f3-4a4f-483a-a366-7e617de9ba99&tenantId=096e524d-6929-4030-8cd3-8ab42de0887b)
\ No newline at end of file
+If you have questions, contact Tom van Woudenberg, Robert Lanzafame or our TA Julie Kirsch at TeachBooks@tudelft.nl, also for non-TU Delft account holders. TU Delft account holder can also contact us in the [MS Teams Open Interactive Textbooks Community](https://teams.microsoft.com/l/team/19%3Ah9-uRcP_yYauh-VuoPFozJVUvHVOB4a0mz1ZWvh4q4Q1%40thread.tacv2/conversations?groupId=3e88c1f3-4a4f-483a-a366-7e617de9ba99&tenantId=096e524d-6929-4030-8cd3-8ab42de0887b)
+
+## Feedback
+We really value your feedback on this manual so we can keep improving it. Please keep using the manual as you build your own Jupyter Book and come back to fill out this short [survey](https://forms.gle/hXbFUQgN95H8ftxt9).
+
+Happy book building!
\ No newline at end of file
diff --git a/dummy.txt b/dummy.txt
new file mode 100644
index 0000000..2995a4d
--- /dev/null
+++ b/dummy.txt
@@ -0,0 +1 @@
+dummy
\ No newline at end of file