Website: Add documentation for Dockerized webnode

Author: iostat

website/docs/node-operators/webnode/local-webnode-docker.md

@@ -0,0 +1,61 @@
+---
+sidebar_position: 1
+title: Local WebNode (Docker)
+description: How to deploy and launch a webnode using Docker images
+---
+
+# Deploying and launching a webnode using Docker
+
+If you intend to just run the webnode instead of actively developing it, it is
+substantially easier to get set up using prebuilt Docker images. These images
+are automatically built on every versioned release.
+
+## Steps
+
+### 1. Generate a node key
+
+:::info This step should be redundant in a future version.
+
+:::
+
+The current version of the webnode requires you to supply a node key, even if
+you don't plan to produce blocks, or you supply your own key archive. This can
+be generated once and reused across launches of the webnode container.
+
+```sh
+# Using the latest version of the Rust node, generate a keypair.
+# The --web-node-secrets flag formats the generated keypair into JSON the webnode can use.
+docker run --rm o1labs/mina-rust:latest misc mina-key-pair --web-node-secrets > $HOME/web-node-key-pair.json
+```
+
+### 2. Launch the webnode container
+
+You can now simply launch the webnode as a container. Note that once
+pre-generating a node keypair is no longer necessary, the `-v` can be removed.
+
+```sh
+# Launch the latest version of the frontend in webnode configuration.
+# We mount the keypair generated in step 1, and bind port 4200 on the host to 80 (http) in the container
+docker run \
+  -e MINA_FRONTEND_ENVIRONMENT=webnode \
+  -v ~/web-node-key-pair.json:/usr/local/apache2/htdocs/assets/webnode/web-node-secrets.json \
+  -p 4200:80 \
+  o1labs/mina-rust-frontend:latest
+```
+
+### 3. Open your browser
+
+Navigate to [http://localhost:4200](http://localhost:4200) and enjoy using the
+webnode! If you used a different port (`-p`) when launching the container, then
+update the port accordingly.
+
+## Environment Variable Reference
+
+The Dockerized WebNode can be configured with additional environment variables
+to customize behavior.
+
+| Environment Variable        | Required? | Description                                                            |
+| :-------------------------- | :-------: | :--------------------------------------------------------------------- |
+| `MINA_FRONTEND_ENVIRONMENT` |    Yes    | Must be set to `webnode` to run the frontend in webnode mode           |
+| `MINA_WEBNODE_SEED_URLS`    |    No     | A comma-separated list of http(s) URLs to fetch initial P2P Seeds from |
+| `MINA_WEBNODE_BOOTNODES`    |    No     | A comma-separated list of initial peers in WebRTC-Multiaddrish format  |

website/sidebars.ts

@@ -61,6 +61,7 @@ const sidebars: SidebarsConfig = {
       items: [
         'node-operators/alpha-testing',
         'node-operators/webnode/local-webnode',
+        'node-operators/webnode/local-webnode-docker',
         'node-operators/testing/overview',
       ],
     },