Update Dockerfile to install Rust and wasm-pack

Set up Rust environment and install wasm-pack.

ente/Dockerfile

@@ -13,7 +13,15 @@ FROM node:22-alpine AS web-builder
 ARG ENTE_WEB_TAG=main          
 
 # ---- tools we need to build (git, yarn)
-RUN apk add --no-cache git rust cargo
+ENV RUSTUP_HOME=/usr/local/rustup \
+    CARGO_HOME=/usr/local/cargo \
+    PATH=/usr/local/cargo/bin:$PATH
+
+RUN apk add --no-cache \
+      git curl ca-certificates build-base \
+ && curl -sSf https://sh.rustup.rs | sh -s -- -y --profile minimal --default-toolchain stable \
+ && rustup target add wasm32-unknown-unknown \
+ && npm install -g wasm-pack@0.13.1
 
 # ---- pull the web source
 WORKDIR /src