Include rust, emscripten, wasm toolchain

Dockerfile

-FROM debian:12.8-slim
+FROM cr.weirdboi.dev/base/rust:1-82-node-22
 
 ARG PLATFORM="linux.x86_64"
 ARG GODOT_VERSION="4.3-stable"
 ARG BUTLER_VERSION="15.12.0"
 
 RUN apt-get update \
-    && apt-get install -y wget zip unzip libfontconfig1 \
+    && apt-get install -y git libfontconfig1 \
     && rm -rf /var/lib/apt/lists/*
 
 COPY commands/godot_build.sh /usr/bin/godot_build
@@ -16,6 +16,17 @@ COPY commands/godot_project_title.sh /usr/bin/godot_project_title
 COPY commands/butler_install.sh /usr/bin/butler_install
 COPY commands/butler_upload.sh /usr/bin/butler_upload
 
+COPY commands/emsdk_install.sh /usr/bin/emsdk_install
+
+RUN rustup component add rust-src --toolchain nightly && \
+    rustup target add wasm32-unknown-emscripten --toolchain nightly
+
 RUN chmod +x /usr/bin/godot_* /usr/bin/butler_*
 RUN godot_install $GODOT_VERSION $PLATFORM
-RUN butler_install $BUTLER_VERSION
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+RUN butler_install $BUTLER_VERSION
+
+ENV EMSDK=/usr/bin/emsdk
+RUN emsdk_install "${EMSDK}"
+
+ENV EMSDK_NODE="${EMSDK}/node/20.18.0_64bit/bin/node"
+ENV PATH="${EMSDK}:${EMSDK}/upstream/emscripten:${PATH}"
\ No newline at end of file

README.md

 ## Godot Builder
 
-A base debian image, configured with tools and helpers required to build godot games in CI
+A base debian image, configured with tools and helpers required to build godot games in CI.
+
+Additionally includes all tools & dependencies to build web content with Node, and Rust extensions
+with Rust & emscripten
 
 ### Commands
 

commands/emsdk_install.sh

+#!/usr/bin/env bash
+
+INSTALL_DIR="$1"
+FULL_DIR="$INSTALL_DIR/emsdk"
+
+mkdir -p "$FULL_DIR"
+git clone https://github.com/emscripten-core/emsdk.git "$FULL_DIR"
+cd "$FULL_DIR"
+"$FULL_DIR/emsdk" install 3.1.62
+"$FULL_DIR/emsdk" activate 3.1.62
+source "$FULL_DIR/emsdk.sh"
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