docs: add full docker deployment docs

docs/cli/commands.md

@@ -206,15 +206,15 @@ The following is an example of a `Dockerfile` that can be used to package the
 output of `backstage-cli backend:bundle` into an image:
 
 ```Dockerfile
-FROM node:14-buster
+FROM node:14-buster-slim
 WORKDIR /app
 
 ADD yarn.lock package.json packages/backend/dist/skeleton.tar.gz ./
-RUN yarn install --production --network-timeout 600000 && rm -rf "$(yarn cache dir)"
+RUN yarn install --frozen-lockfile --production --network-timeout 300000 && rm -rf "$(yarn cache dir)"
 
 ADD packages/backend/dist/bundle.tar.gz app-config.yaml ./
 
-CMD node packages/backend
+CMD ["node", "packages/backend"]
 ```
 
 ```text