Merge pull request #39 from matter-labs/keriat-zkf-1625-outdated-port…

…al-link

docs/dev/guide/hello-world.md

@@ -266,11 +266,11 @@ By default, the page should be running at `http://localhost:8080`. Open this URL
 In order to interact with dApps built on zkSync, connect the Metamask wallet to the zkSync alpha testnet network and bridge some funds to L2.
 
 - The [guide](../testnet/metamask.md) on connecting to Metamask.
-- Use our [portal](https://zqgai-staging-wallet-v2.zksync.dev) to bridge funds to zkSync.
+- Use our [portal](https://portal.zksync.io) to bridge funds to zkSync.
 
 ### Project structure
 
-All of the code will be written in the `./src/App.vue`. All the front-end code has been completed; the only task left is to fill out the TODO-s regarding interaction with zkSync:
+All the code will be written in the `./src/App.vue`. All the front-end code has been completed; the only task left is to fill out the TODO-s regarding interaction with zkSync:
 
 ```javascript
 initializeProviderAndSigner() {
@@ -434,7 +434,7 @@ initializeProviderAndSigner() {
 },
 ```
 
-### Retreiving the greeting
+### Retrieving the greeting
 
 1. Fill in the method retrieving the greeting from smart contract: