docs: add some more docs for --install-links

Author: nlf

docs/content/commands/npm-ci.md

@@ -48,8 +48,9 @@ In short, the main differences between using `npm install` and `npm ci` are:
 
 NOTE: If you create your `package-lock.json` file by running `npm install`
 with flags that can affect the shape of your dependency tree, such as
-`--legacy-peer-deps`, you _must_ provide the same flags to `npm ci` or you
-are likely to encounter errors. An easy way to do this is to run
+`--legacy-peer-deps` or `--install-links`, you _must_ provide the same
+flags to `npm ci` or you are likely to encounter errors. An easy way to do
+this is to run, for example,
 `npm config set legacy-peer-deps=true --location=project` and commit the
 `.npmrc` file to your repo.
 

docs/content/commands/npm-install.md

@@ -91,12 +91,12 @@ into a tarball (b).
     *npm will not install the package dependencies* in the directory `<folder>`, 
     but it will create a symlink to `<folder>`.
 
-    > NOTE: If you want to install the content of a directory like a package from the registry instead of creating a link, you would need to use [`npm pack`](/commands/npm-pack) while in the `<folder>` directory, and then install the resulting tarball instead of the `<folder>` using `npm install <tarball file>`
+    > NOTE: If you want to install the content of a directory like a package from the registry instead of creating a link, you would need to use the `--install-links` option.
 
     Example:
 
     ```bash
-    npm install ../../other-package
+    npm install ../../other-package --install-links
     npm install ./sub-package
     ```