Add builder Dockerfile and steps in CI

deployment/Dockerfile.docker

@@ -0,0 +1,11 @@
+FROM node:alpine
+
+ARG SOURCE_DIR=/src
+ARG ARTIFACT_DIR=/jellyfin-web
+
+RUN apk add autoconf g++ make libpng-dev gifsicle alpine-sdk automake libtool make gcc musl-dev nasm python
+
+WORKDIR ${SOURCE_DIR}/
+COPY . .
+
+RUN yarn install && mv dist ${ARTIFACT_DIR}