add alt text, links and warning format

Author: nidhi-singh02

apps/developer-hub/content/docs/express-relay/contract-addresses.mdx

@@ -24,8 +24,9 @@ import CopyAddress from "../../../src/components/CopyAddress";
 </Tab>
 <Tab value="testing">
 
-> ⚠️ **Warning**
-> To simulate real performance conditions and activity, the staging/testing environment for Solana is on the mainnet-beta network. This environment is not for production use and should only be used for testing.
+<Callout variant="warning">
+To simulate real performance conditions and activity, the staging/testing environment for Solana is on the mainnet-beta network. This environment is not for production use and should only be used for testing.
+</Callout>
 
 **Auction Server endpoint:** <CopyAddress address="https://per-staging.dourolabs.app/" />
 
@@ -40,7 +41,7 @@ import CopyAddress from "../../../src/components/CopyAddress";
 | Limo Global Order Config | <CopyAddress address="TeStcUQMmECYEtdeXo9cXpktQWaGe4bhJ7zxAUMzB2X" url="https://solscan.io/account/TeStcUQMmECYEtdeXo9cXpktQWaGe4bhJ7zxAUMzB2X" /> |
 | Testing Frontend | <CopyAddress address="https://limo.kamino-webapp.pages.dev/swap" url="https://limo.kamino-webapp.pages.dev/swap" /> |
 
-### This list contains the addresses of the commonly used assets present in opportunities on development-solana:
+** This list contains the addresses of the commonly used assets present in opportunities on development-solana:
 
 | Asset | Address                                                                                                                                              |
 | ----- | ---------------------------------------------------------------------------------------------------------------------------------------------------- |

apps/developer-hub/content/docs/express-relay/how-express-relay-works/auction.mdx

@@ -5,7 +5,7 @@ description: >-
 ---
 
 The auction in Express Relay is held off-chain at the auction server.
-Bids arrive at the auction server and compete against other bids, vying for the same [permission key](./permissioning.mdx).
+Bids arrive at the auction server and compete against other bids, vying for the same [permission key](permissioning).
 A relayer selected by governance serves as the auctioneer and determines the auction in line with the criterion of maximizing the revenue shared back to the protocol that generated this opportunity. That means the auctioneer is expected to forward on-chain the subset of bids that maximizes the revenue back to the protocol.
 
 Thus, the Express Relay auction is analogous to a sealed-bid auction, i.e., participants in the auction will not have the contents of their bid disclosed publicly unless they win the auction and are forwarded on-chain.

apps/developer-hub/content/docs/express-relay/how-express-relay-works/index.mdx

@@ -10,15 +10,15 @@ For example, borrow-lending protocols provide bonuses to searchers for liquidati
 Searchers compete for these bonuses by tipping the chain's miners or validators.
 The validators capture most of the value of the liquidation bonus via these tips, so the liquidation bonus is in essence a transfer of wealth from the protocol's users to the validators in the form of tips.
 
-Express Relay solves the problem of MEV by providing protocol developers with an [auction](./how-express-relay-works/auction.mdx) primitive that they can use to prioritize access to valuable protocol operations.
+Express Relay solves the problem of MEV by providing protocol developers with an [auction](./how-express-relay-works/auction) primitive that they can use to prioritize access to valuable protocol operations.
 Developers specify a set of operations in their protocol that must be accessed through Express Relay.
 Searchers then participate in an off-chain auction to access these operations.
 Their bids in the auction are used to determine the order in which their transactions will be executed.
 The winners' transactions are forwarded to the Express Relay smart contract. As part of the transaction, searchers must pay their specified bid.
 The auction profits are then split between the integrated protocol and other participants in Express Relay.
 
-![](./../images/before_express.jpg)
-![](./../images/after_express.jpg)
+![Before Express Relay](./../images/before_express.jpg)
+![After Express Relay](./../images/after_express.jpg)
 
 The diagram above shows how Express Relay changes the MEV landscape for a liquidation.
 In the status quo (above), Searchers tip miners to guarantee that their liquidation transaction lands on-chain and that their transaction directly interacts with the protocol, exposing the liquidation opportunity.