ci: run npm ci in dockerfile

etc/dockerfile

@@ -2,6 +2,8 @@ FROM golang:alpine3.21 AS build
 RUN apk add build-base git nodejs npm
 WORKDIR /src
 COPY . .
+RUN --mount=type=cache,target=/root/.npm \
+    npm ci
 RUN --mount=type=cache,target=/root/.cache/go-build \
     --mount=type=cache,target=/root/go/pkg \
   make host

etc/dockerfile.arm

@@ -22,6 +22,8 @@ ENV PATH=$PATH:/usr/local/go/bin
 WORKDIR /root/src
 RUN mkdir /root/out
 COPY . .
+RUN --mount=type=cache,target=/root/.npm \
+    npm ci
 
 # Build ARM64
 RUN env \