fix(rust-wasm): run as wokwi user

`nobody` user isn't recommended

also run cargo in offline mode

Author: urish

rust-wasm/Dockerfile

@@ -1,17 +1,17 @@
 FROM alpine:3.16
 RUN apk update
 RUN apk add rust cargo rust-wasm
+RUN adduser -D wokwi
 COPY project /project
 
-RUN chown nobody /project/src/lib.rs && chmod o+w /project
+RUN chown wokwi /project/src/lib.rs && chmod o+w /project
 
 WORKDIR /project
-USER nobody
-ENV HOME=/tmp
+USER wokwi
 RUN cargo build --target wasm32-unknown-unknown --release
 
 # Wokwi builder configuration:
 ENV HEXI_SRC_DIR="/project/src"
-ENV HEXI_BUILD_CMD="cargo build --target wasm32-unknown-unknown --release"
+ENV HEXI_BUILD_CMD="cargo build --target wasm32-unknown-unknown --release --offline"
 ENV HEXI_OUT_HEX="/project/target/wasm32-unknown-unknown/release/chip_rust.wasm"
 ENV HEXI_OUT_ELF="/project/target/wasm32-unknown-unknown/release/chip_rust.wasm"