fix broken links

plutus-playground-client/README.md

@@ -3,7 +3,7 @@ simulate Plutus Applications.
 
 ## Getting started
 
-The Plutus Playground is written in [PureScript](https://www.purescript.org/) and uses npm and [spago](https://github.com/purescript/spago) for managing dependencies. It talks to the [plutus-playground-server](https://github.com/input-output-hk/plutus/tree/master/plutus-playground-server) which also needs to be up and running during development. The client build also depends on purescript files that are generated by the backend service using [purescript-bridge](https://github.com/eskimor/purescript-bridge).
+The Plutus Playground is written in [PureScript](https://www.purescript.org/) and uses npm and [spago](https://github.com/purescript/spago) for managing dependencies. It talks to the [plutus-playground-server](https://github.com/input-output-hk/plutusa-apps/tree/master/plutus-playground-server) which also needs to be up and running during development. The client build also depends on purescript files that are generated by the backend service using [purescript-bridge](https://github.com/eskimor/purescript-bridge).
 
 **Note**: _The workflow described here relies heavily on Nix. This means you should either be working inside a nix-shell environment or use tools such as [lorri](https://github.com/target/lorri) or [nix-direnv](https://github.com/nix-community/nix-direnv) or similar to provide a suitable environment._
 
@@ -14,7 +14,7 @@ $ plutus-playground-server
 ```
 
 The `plutus-playground-server` script is provided by the global [shell.nix](../shell.nix) and starts the server (If the command
-is not available make sure you are in a nix-shell session or that lorri is ready). For additional information on invoking the backend server please refer to its [README.md](https://github.com/input-output-hk/plutus/blob/master/plutus-playground-server/README.md).
+is not available make sure you are in a nix-shell session or that lorri is ready). For additional information on invoking the backend server please refer to its [README.md](https://github.com/input-output-hk/plutus-apps/tree/main/plutus-playground-server).
 
 ### Starting the frontend server
 
@@ -31,7 +31,7 @@ The `start` script will:
 - Compile the purescript code
 - Start the webkpack server
 
-Once the `start` script completes you can access the frontend via [http://localhost:8009](http://localhost:8009)
+Once the `start` script completes you can access the frontend via [https://localhost:8009](https://localhost:8009)
 
 > **Note**: You may need to adjust `webpack.config.js` to serve non-SSL content; set
 > `module.exports.devServer.https` to `false`.
@@ -45,7 +45,7 @@ The following outlines some essentials for actually working on the plutus playgr
 Apart from the `start` script introduced above there are a couple of scripts for the most frequent tasks during development. In order to run a webpack server in development mode with automatic reloading use **webpack:server**:
 
 ```
-$ npm webpack:server
+$ npm run build:webpack:dev
 ```
 
 Please refer to [package.json](./package.json) for the full set of provided scripts.
@@ -112,10 +112,5 @@ You can run the following command (from the repository root) to build the client
 backend server with Nix:
 
 ```sh
-$ nix-build \
-  --option trusted-public-keys "hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ=" \
-  --option substituters https://hydra.iohk.io \
-  -A plutus-playground.client -A plutus-playground.server
+$ nix-build -A plutus-playground.client -A plutus-playground.server
 ```
-
-**Note**: When building the client make sure that the generated directory is removed completely or you will get _Duplicate module_ errors.