docs: update docs to reflect au and PoS changes (#4878)

Author: PoisonPhang

docs/src/content/docs/infrastructure/node-operators/node-configuration.mdx

@@ -47,13 +47,13 @@ Located in `config/app.toml`, this file is host to app settings.
 
 Located under the "Base Configuration" section of `config/app.toml`.
 
-The [skip-mev/feemarket](https://github.com/skip-mev/feemarket/) module sets a global gas price/fee. To ensure consistency with the rest of the network, set this to `"0muno"`.
+The [skip-mev/feemarket](https://github.com/skip-mev/feemarket/) module sets a global gas price/fee. To ensure consistency with the rest of the network, set this to `"0au"`.
 
 ```toml
 # The minimum gas prices a validator is willing to accept for processing a
 # transaction. A transaction's fees must meet the minimum of any denomination
 # specified in this config (e.g. 0.25token1;0.0001token2).
-minimum-gas-prices = "0muno"
+minimum-gas-prices = "0au"
 ```
 
 ### Pruning

docs/src/content/docs/joining-testnet/creating-validators.mdx

@@ -46,7 +46,7 @@ Add the following content to the file:
 ```json title="validator.json"
 {
 	"pubkey": <PUBKEY>,
-	"amount": "1000000muno",
+	"amount": "1000000au",
 	"moniker": "<MONIKER>",
 	"identity": "optional identity signature (ex. UPort or Keybase)",
 	"website": "validator's (optional) website",
@@ -65,14 +65,40 @@ Replacing:
 - `<MONIKER>` with your moniker
 - And the optional content with your preferred details
 
-### 2) Run the Create Validator Command
+### 2) Create a Proof of Possession
+
+:::note
+
+This step is specific to the Union network, other Cosmos based chains do not currently replicate this process.
+
+:::
+
+Assuming your private validator key is in the default location:
+
+<Tabs>
+  <TabItem label='uniond-release'>
+    ```sh frame="none"
+	export PRIV_KEY=$(jq -r '.priv_key.value' ~/.union/config/priv_validator_key.json)
+	export POSSESSION_PROOF=$(uniond prove-possession "$PRIV_KEY")
+	```
+  </TabItem>
+  <TabItem label='Unionvisor'>
+    ```sh frame="none"
+	export PRIV_KEY=$(jq -r '.priv_key.value' ~/.unionvisor/home/config/priv_validator_key.json)
+	export POSSESSION_PROOF=$(uniond prove-possession "$PRIV_KEY")
+	```
+  </TabItem>
+</Tabs>
+
+
+### 3) Run the Create Validator Command
 
 Then you can submit this file using the `create-union-validator` sub-command:
 
 ```sh frame="none"
-uniond tx poa create-validator path/to/validator.json \
-  --from $KEY_NAME \
-  --chain-id union-testnet-10
+uniond tx union-staking create-union-validator $VALIDATOR_JSON_PATH $POSSESSION_PROOF \
+	--from $KEY_NAME \
+	--chain-id union-testnet-10
 ```
 
 _Where `VALIDATOR_JSON_PATH` is the path to your `validator.json`_
@@ -90,7 +116,7 @@ touch ~/.unionvisor/validator.json
 
 # Then after editing the json content
 
-uniond tx poa create-validator /.unionvisor/validator.json \
+uniond tx union-staking create-union-validator /.unionvisor/validator.json $POSSESSION_PROOF \
 	--from $KEY_NAME \
 	--chain-id union-testnet-10
 ```

docs/src/content/docs/joining-testnet/getting-tokens.mdx

@@ -4,11 +4,11 @@ sidebar:
   order: 3
 ---
 
-To participate in the Union Testnet, you will first need an account with a UNO balance.
+To participate in the Union Testnet, you will first need an account with a U balance.
 
-UNO is the primary token denom for the Union Testnet. We technically represent UNO as `muno` a fixed point representation of UNO with six digits of precision. This means that a balance of `1000000muno` is equivalent to 1 UNO.
+U is the primary token for the Union Testnet. We technically represent U as `au`, a fixed point representation of U with 18 digits of precision. This means that a balance of `1000000000000000000au` is equivalent to 1 U.
 
-To ensure a fair initial distribution of Testnet tokens to validators, we will be supplying your accounts with an UNO balance.
+To ensure a fair initial distribution of Testnet tokens to validators, we will be supplying your accounts with a U balance.
 
 ## Getting a Testnet Account
 
@@ -52,7 +52,7 @@ Take note of your `address` here and continue to [Receiving Testnet Tokens](#rec
 
 ### Finding your Union Address
 
-To ensure your account will have an UNO balance, please submit the address from your newly created or recovered account.
+To ensure your account will have a U balance, please submit the address from your newly created or recovered account.
 
 If you haven't already noted down your address, you can retrieve it with the following command: