fix: dockerfile

Author: EwoutV

Dockerfile.prod

@@ -4,11 +4,10 @@ WORKDIR /blokmap-docs
 
 COPY package.json package-lock.json ./
 
-RUN npm install -g npm
-RUN npm install
+RUN npm ci
 
 COPY . .
 
 RUN npm run docs:build
 
-CMD cp -r ./docs/.vitepress/dist/* "${OUTPUT_DIR:-/well-known}/"
+CMD cp -r ./docs/.vitepress/dist/* "${OUTPUT_DIR:-/well-known}/"