Add the organic AST explorer to the CI builds for the homepage.

docker/organic/Dockerfile

@@ -0,0 +1,7 @@
+FROM rustlang/rust:nightly-alpine3.17
+
+RUN apk add --no-cache musl-dev make bash
+RUN rustup target add wasm32-unknown-unknown
+RUN cargo install wasm-bindgen-cli
+
+CMD ["make", "wasm"]