docker: update build file

Author: x1unix

build/Dockerfile

@@ -1,8 +1,8 @@
 FROM node:13-alpine as ui-build
 COPY web /tmp/web
 WORKDIR /tmp/web
-ARG APP_VERSION="1.0.0"
-ARG GITHUB_URL="https://github.com/x1unix/go-playground"
+ARG APP_VERSION=1.0.0
+ARG GITHUB_URL=https://github.com/x1unix/go-playground
 RUN yarn install --silent && REACT_APP_VERSION=$APP_VERSION REACT_APP_GITHUB_URL=$GITHUB_URL yarn build
 
 FROM golang:1.13-alpine as build
@@ -11,7 +11,9 @@ COPY cmd ./cmd
 COPY pkg ./pkg
 COPY go.mod .
 COPY go.sum .
-RUN go build -o server ./cmd/playground
+RUN go build -o server ./cmd/playground && \
+    GOOS=js GOARCH=wasm go build -o ./worker.wasm ./cmd/webworker && \
+    cp $(go env GOROOT)/misc/wasm/wasm_exec.js .
 
 FROM golang:1.13-alpine as production
 WORKDIR /opt/playground
@@ -21,5 +23,7 @@ ENV APP_DEBUG=false
 COPY data ./data
 COPY --from=ui-build /tmp/web/build ./public
 COPY --from=build /tmp/playground/server .
+COPY --from=build /tmp/playground/worker.wasm ./public
+COPY --from=build /tmp/playground/wasm_exec.js ./public
 EXPOSE 8000
 ENTRYPOINT /opt/playground/server -f=/opt/playground/data/packages.json -addr=:8000 -clean-interval=${APP_CLEAN_INTERVAL} -debug=${APP_DEBUG}