Doc Update docs for frontend-compile

As frontend compile step is done now inside docker container, we do not
need to do it before. This is updating the documentation so it reflects
the code changes made.

Author: Toxix

docs/administration.rst

@@ -92,7 +92,6 @@ B.  If you built the image yourself, do the following:
     .. code:: shell-session
 
         $ git pull
-        $ ./compile-frontend.sh
         $ docker-compose build
         $ docker-compose up
 

docs/extending.rst

@@ -59,11 +59,11 @@ To do the setup you need to perform the steps from the following chapters in a c
 
         pipenv install --dev
 
-7.  Generate the static UI so you can perform a login to get session that is required for frontend development (this needs to be done one time only). From root folder:
+7.  Generate the static UI so you can perform a login to get session that is required for frontend development (this needs to be done one time only). From src-ui directory:
 
     .. code:: shell-session
 
-        compile-frontend.sh
+        ./node_modules/.bin/ng build --prod
 
 8.  Apply migrations and create a superuser for your dev instance:
 
@@ -272,15 +272,7 @@ directory.
 Building the Docker image
 =========================
 
-Building the docker image from source requires the following two steps:
-
-1.  Build the front end.
-
-    .. code:: shell-session
-
-        ./compile-frontend.sh
-
-2.  Build the docker image.
+Building the docker image from source:
 
     .. code:: shell-session