docs/rofl: Simplify rofl build instructions

Author: ptrus

docs/rofl/quickstart.mdx

@@ -135,18 +135,9 @@ If the transaction succeeds, you should be able to find your app on the
 
 Next, build the ROFL bundle.
 
-<Tabs>
-    <TabItem value="Native Linux">
-        ```shell
-        oasis rofl build
-        ```
-    </TabItem>
-    <TabItem value="Docker (Windows, Mac, Linux)">
-        ```shell
-        docker run --platform linux/amd64 --volume .:/src -it ghcr.io/oasisprotocol/rofl-dev:main oasis rofl build
-        ```
-    </TabItem>
-</Tabs>
+```shell
+oasis rofl build
+```
 
 As a result, a new `.orc` file will appear inside your project folder.
 

docs/rofl/workflow/build.mdx

@@ -1,6 +1,3 @@
-import Tabs from "@theme/Tabs";
-import TabItem from "@theme/TabItem";
-
 # Build
 
 This operation packs `compose.yaml`, specific operating system components and
@@ -20,18 +17,9 @@ before granting them access to the key management system and [other features].
 
 To build an app and update the enclave identity in the app manifest, simply run:
 
-<Tabs>
-    <TabItem value="Native Linux">
-        ```shell
-        oasis rofl build
-        ```
-    </TabItem>
-    <TabItem value="Docker (Windows, Mac, Linux)">
-        ```shell
-        docker run --platform linux/amd64 --volume .:/src -it ghcr.io/oasisprotocol/rofl-dev:main oasis rofl build
-        ```
-    </TabItem>
-</Tabs>
+```shell
+oasis rofl build
+```
 
 This will generate a ROFL bundle which can be used for later deployment and
 output something like:

docs/rofl/workflow/prerequisites.mdx

@@ -25,22 +25,12 @@ Pick among the three setups below.
 
 1. [Download and install][oasis-cli-setup] the Oasis CLI to your platform.
 
-2. For building apps for ROFL, the Oasis team prepared the
-   [`ghcr.io/oasisprotocol/rofl-dev`][rofl-dev] image. It contains all
-   the tools needed to compile any ROFL flavor of your app. You can test it out
-   by running:
+2. Test that everything works by building the ROFL app:
 
    ```shell
-   docker run --platform linux/amd64 --rm -v .:/src -it ghcr.io/oasisprotocol/rofl-dev:main oasis rofl build
+   oasis rofl build
    ```
 
-   :::info --platform linux/amd64
-
-   Always provide the `--platform linux/amd64` parameter to the `rofl-dev` image,
-   no matter which processor your computer has or the operating system you're running.
-
-   :::
-
 [rofl-dev]: https://github.com/oasisprotocol/oasis-sdk/pkgs/container/rofl-dev
 [oasis-cli-setup]: ../../tools/cli/setup.mdx