Angular (2+, 4+) - Setting the base tag in index.html for a sub-folder for deploying to hosted server at build time.

E.g. you want to deploy to an external server but not into the root of that server rather to a subfolder, like so:

            From to this directory **www.dthuesen.de**

            to this directory **www.dthuesen.de/subdirectory**

Then you have to do this:

Running a deployment of Angular in a subdirectory requires to set the base tag in index.html to the desired sub-folder by running the build command with the according option: Usage: ng build --base-href <base> or ng build --base-href /myUrl/ or ng build --bh /myUrl/

so in the example "www.dthuesen.de/subdirectory" the basetag would be written instead

<base href="/">

it would be replaced with

<base href="/home">