Added setup instructions for version 8.x

Author: ba0708

installing-kibana-on-macos-and-linux.md

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+# Setting up Elasticsearch & Kibana on macOS & Linux
+
+## Extracting the archives
+
+Both the Elasticsearch and Kibana archives can be extracted by using the below commands. 
+Alternatively, simply double-clicking them should do the trick.
+
+```
+cd /path/to/archive/directory
+tar -zxf archive.tar.gz
+```
+
+## Starting up Elasticsearch
+
+```
+cd /path/to/elasticsearch
+bin/elasticsearch
+```
+
+## Resetting the `elastic` user's password
+
+If you lose the password for the `elastic` user, it can be reset with the following commands.
+
+```
+cd /path/to/elasticsearch
+bin/elasticsearch-reset-password -u elastic
+```
+
+## Generating a new Kibana enrollment token
+
+If you need to generate a new enrollment token for Kibana, this can be done with the following commands.
+
+```
+cd /path/to/elasticsearch
+bin/elasticsearch-create-enrollment-token --scope kibana
+```
+
+## Disabling Gatekeeper for Kibana directory
+
+macOS contains a security feature named Gatekeeper, which prevents Kibana from starting up. 
+We can disable it for just the Kibana directory, which allows Kibana to start up correctly. 
+Simply use the following command to do so.
+
+```
+xattr -d -r com.apple.quarantine /path/to/kibana
+```
+
+## Starting up Kibana
+
+```
+cd /path/to/kibana
+bin/kibana
+```

installing-kibana-on-windows.md

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+# Setting up Elasticsearch & Kibana on Windows
+
+## Starting up Elasticsearch
+
+```
+cd path\to\elasticsearch
+bin\elasticsearch.bat
+```
+
+## Resetting the `elastic` user's password
+
+If you lose the password for the `elastic` user, it can be reset with the following commands.
+
+```
+cd path\to\elasticsearch
+bin\elasticsearch-reset-password.bat -u elastic
+```
+
+## Generating a new Kibana enrollment token
+
+If you need to generate a new enrollment token for Kibana, this can be done with the following commands.
+
+```
+cd path\to\elasticsearch
+bin\elasticsearch-create-enrollment-token.bat -s kibana
+```
+
+## Starting up Kibana
+
+```
+cd path\to\kibana
+bin\kibana.bat
+```