Add troubleshooting page (#136)

---------

Co-authored-by: Maycon Santos <mlsmaycon@gmail.com>

src/pages/selfhosted/identity-providers.mdx

@@ -472,7 +472,7 @@ In this step, we will create OAuth2/OpenID Provider in Authentik.
     - Name: `Netbird`
     - Authentication Flow: `default-authentication-flow (Welcome to authentik!)`
     - Authorization Flow: `default-provider-authorization-explicit-consent (Authorize Application)`
-    - Protocal Settings:
+    - Protocol Settings:
         - Client type: `Public`
         - Redirect URIs/Origins (RegEx): `https://<domain>`, `https://<domain>.*`, `http://localhost:53000` (Each URI should be entered on a new line)
     - Advanced protocol settings:
@@ -726,7 +726,7 @@ Before you start creating and configuring an Okta application, ensure that you h
 In this step, we will create and configure Netbird single-page application in okta.
 - Navigate to Okta Admin Dashboard
 - Click `Applications` in the left menu and then click on `Applications`
-- Click `Create App Intergration`
+- Click `Create App Integration`
 - Fill in the form with the following values and click `Next`
   - Sign-in method: `OIDC - OpenID Connect`
   - Application type: `Single-Page Application`
@@ -761,7 +761,7 @@ In this step, we will create and configure Netbird single-page application in ok
 In this step, we will create and configure Netbird native application in okta.
 - Navigate to Okta Admin Dashboard
 - Click `Applications` in the left menu and then click on `Applications`
-- Click `Create App Intergration`
+- Click `Create App Integration`
 - Fill in the form with the following values and click `Next`
   - Sign-in method: `OIDC - OpenID Connect`
   - Application type: `Native Application`

src/pages/selfhosted/selfhosted-guide.mdx

@@ -38,7 +38,7 @@ REPO="https://github.com/netbirdio/netbird/"
 LATEST_TAG=$(basename $(curl -fs -o/dev/null -w %{redirect_url} ${REPO}releases/latest))
 echo $LATEST_TAG
 
-# this comman will clone the latest tag
+# this command will clone the latest tag
 git clone --depth 1 --branch $LATEST_TAG $REPO
 ```
 

src/pages/selfhosted/selfhosted-quickstart.mdx

@@ -98,7 +98,7 @@ rm -f docker-compose.yml Caddyfile zitadel.env dashboard.env machinekey/zitadel-
 
 ### Troubleshoot
 
-- I'm trying to register a user but I didn't receive a verification code. Whats is the problem?
+- I'm trying to register a user but I didn't receive a verification code. What's the problem?
 
     The NetBird quickstart script generates a user name and a password for the administrator. This should be enough to login and manage your network.
     If you want to register a new user and invite them via email, you need to configure a SMTP server in Zitadel. See [this guide](https://zitadel.com/docs/guides/manage/console/instance-settings#smtp) or details.

src/pages/selfhosted/troubleshooting.mdx

@@ -0,0 +1,23 @@
+# Troubleshooting
+This page will help with various issues when self-hosting NetBird.
+## Debugging TURN connections
+
+In the case that the peer-to-peer connection is not an option then the peer will use the TURN server for the secure connection establishment. If the connection is not possible even with TURN (Relay),
+then we need to confirm that your turn configuration is correct and that it is available.
+
+To test your TURN configuration you can access the [online tester](https://webrtc.github.io/samples/src/content/peerconnection/trickle-ice).
+There you will find a ICE servers input box, where you can select and remove the existing server, then add your turn server
+configuration as follows:
+
+Please replace <b>netbird.DOMAIN.com</b> and <b>PASSWORD</b> with the information from the <b>management.json</b> TURNConfig, then click on <b>Add server</b>.
+
+<p>
+    <img src="/docs-static/img/troubleshooting/turn.png" alt="turn" width="700" className="imagewrapper"/>
+</p>
+
+You should see an output similar to the following:
+<p>
+    <img src="/docs-static/img/troubleshooting/turn-test-out.png" alt="turn" width="700" className="imagewrapper"/>
+</p>
+Where you have the following types: `host` (local address), `srflx` (STUN reflexive address), `relay`
+(TURN relay address). If `srflx` and `relay` are not present then the TURN server is not working or not accessible and you should review the required ports in the [requirements section](/selfhosted/selfhosted-guide#requirements).