Added docs to build webnode

Author: 0xMimir

README.md

@@ -21,6 +21,7 @@ _Currently in **public beta**, join our [Discord community](https://discord.com/
 ### Building from Source
 
 - [Rust Node](/docs/building-from-source-guide.md#how-to-build-and-launch-a-node-from-source) and [Dashboards](./docs/building-from-source-guide.md#how-to-launch-the-ui)
+- [Web Node](/docs/local-webnode.md)
 
 ### Run Node on Devnet via Docker
 

docs/local-webnode.md

@@ -0,0 +1,59 @@
+# How to build and launch webnode from source
+
+## Steps
+
+Install the rust and node:
+```sh
+# Install rustup and set the default Rust toolchain to 1.84 (newer versions work too)
+curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain 1.84
+# Setup the current shell with rustup
+source "$HOME/.cargo/env"
+
+# Download and install nvm:
+curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.3/install.sh | bash
+# in lieu of restarting the shell
+\. "$HOME/.nvm/nvm.sh"
+# Download and install Node.js:
+nvm install 21
+```
+
+Clone the repo
+```sh
+git clone https://github.com/openmina/openmina.git
+cd openmina/
+```
+
+Build the web node, `wasm-pack` command should take a bit, around 10min
+```sh
+cargo install wasm-pack        
+cd node/web 
+rustup toolchain install nightly
+rustup override set nightly 
+wasm-pack build --target web --out-dir pkg  
+cp -rf pkg ../../frontend/src/assets/webnode
+```
+
+Download `circuit-blobs`, from the root of project run:
+```sh
+cd frontend/src/assets/webnode
+git clone --depth 1 https://github.com/openmina/circuit-blobs.git
+```
+
+And create `web-node-secrets.json` in `frontend/src/assets/webnode` it should be in following format:
+```json
+{
+    "publicKey": "B62qk1UDzvtw82kiSznZEtSdFUg9oW8di5p53cVr2FxDBzjv9bW2Wf6",
+    "privateKey": "EKLf3tJd7aKegmhr5qyghagM25LQ98Cu413f1a5e18ubUMgGZY8x"
+}
+```
+
+These keys can be generated by running:
+```sh
+cargo run -r --bin openmina -- misc mina-key-pair
+```
+
+Install frontend dependencies and run the webnode:
+```sh
+cd frontend
+npm run start:webnode
+```