add wasm.Dockerfile

[cataggar]

Here is how to build and run using Wasmtime https://wasmtime.dev/ and Docker https://docs.docker.com/desktop/wasm/ . Since it is I/O bound, it takes 24 seconds on Docker for Windows and 1.6 seconds under Wasmtime.

cargo install cargo-wasi
cargo wasi build --release

winget install BytecodeAlliance.Wasmtime
wasmtime run --dir $EV2 target\wasm32-wasi\release\configur.wasm -- config $EV2/environments $EV2/scratch

docker buildx build --platform wasi/wasm --provenance=false -f wasm.Dockerfile -t $REGISTRY/cataggar/configur.wasm .

Due to bug, --provenance=false is temporarily required.

docker run --platform=wasi/wasm --runtime=io.containerd.wasmtime.v1 --rm -v ${EV2}:/ev2 $REGISTRY/cataggar/configur.wasm config /ev2/environments /ev2/scratch