Build frontend app in Docker too

.dockerignore

···
-*
+*/
 !frontend
 frontend/node_modules
-frontend/src
-frontend/esbuild.js
-frontend/tsconfig.json
+frontend/build
 !server
 server/target

Dockerfile

···
-FROM rust:1.61 as builder
+FROM node:16 as build-js
+
+WORKDIR /usr/src/myivo
+
+COPY frontend/package*.json .
+RUN npm install
+
+COPY frontend .
+RUN npm run build
+
+FROM rust:1.61 as builder-rs
 
 WORKDIR /usr/src/myivo-server
 COPY server .
···
 
 RUN apt-get update && apt-get install -y openssl && rm -rf /var/lib/apt/lists/*
 
-COPY frontend .
-COPY --from=builder /usr/local/cargo/bin/myivo-server /usr/local/bin/myivo-server
+WORKDIR /root
+
+COPY --from=build-js /usr/src/myivo/index.html ./
+COPY --from=build-js /usr/src/myivo/images ./images 
+COPY --from=build-js /usr/src/myivo/fonts ./fonts
+COPY --from=build-js /usr/src/myivo/build ./build
+COPY --from=builder-rs /usr/local/cargo/bin/myivo-server /usr/local/bin/
 
 EXPOSE 8080