chore: copy across `.npmrc` to docker build (#2152)

Dockerfile

@@ -14,6 +14,7 @@ RUN apk add git --no-cache
 
 # Prepare build deps ( ignore postinstall scripts for now )
 COPY package.json ./
+COPY .npmrc ./
 COPY pnpm-lock.yaml ./
 COPY patches ./patches
 RUN pnpm i --frozen-lockfile --ignore-scripts