Update 0_0_setup.md

polished how to get help

book/opmanual_duckiebot/atoms_17_operation_manual_duckiebot/0_0_setup.md

@@ -7,18 +7,17 @@ In this section you will find the necessary information on how to get started wi
 
 There are several ways to get help:
 
-1. Join the [Duckietown Stack Overflow](https://stackoverflow.com/c/duckietown/questions) space. This is a private space and requires invitation. Sign up on the [Duckietown website](https://www.duckietown.org/site/register) to receive an invitation.
+1. Join the [Duckietown Stack Overflow](https://stackoverflow.com/c/duckietown/questions) space. This is a private space and requires invitation. You can be invited from within the Duckietown Slack.
 
-2. Join the [Duckietown Slack](https://join.slack.com/t/duckietown/shared_invite/enQtNTU0Njk4NzU2NTY1LWM2YzdlNmJmOTg4MzAyODc2YTI3YTc5MzE2MThkZGUwYTFkZWQ4M2ZlZGU1YTZhYjg5YTgzNDkyMzI2ZjNhZWE), `#how-to-get-help` channel (or a more appropriate one depending on the specificity of your question).
+2. Join the [Duckietown Slack](https://cutt.ly/93gP1fy), `#how-to-get-help` channel (or a more appropriate one depending on the specificity of your question).
 
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