Build docker image with FGLGWS package

Follow this process to build a docker image with an FGLGWS package for use in a docker container.

About this task: The procedure described here applies to a Genero Business Development Language (BDL) installation in a docker container. The procedure may be adapted to add other Genero products to the docker container.

Before you begin:

You have created a docker image called fglgws-os as described in Build operating system image.
You have the FGLGWS package required for your installation downloaded to your system from the Four Js web site, www.4js.com.
You have Docker installed and running.

Make a directory with a name that relates to your image.
For example, a directory called fglgws-base may contain a Dockerfile for your image.
```
mkdir fglgws-base
```

Create a docker file to install the FGLGWS package.

With a text editor create the file as shown, and save it as Dockerfile:

FROM fglgws-os
USER root

ARG user=genero
ARG group=fourjs
ARG FGLGWS_PACKAGE

WORKDIR ${HOME}

COPY ${FGLGWS_PACKAGE} /tmp/fglgws-install.run

RUN mkdir -p /opt/fourjs \
  && chown ${user}:${group} /opt/fourjs /tmp/fglgws-install.run
USER ${user}

# Install fglgws package
ENV FGLDIR /opt/fourjs/fglgws
ENV PATH ${FGLDIR}/bin:${PATH}
RUN /tmp/fglgws-install.run --accept --install --quiet --target ${FGLDIR} \
  && fglrun -V \
  && rm -f /tmp/fglgws-install.run

In this example, the base image already created is used to build the FGLGWS installation (FROM fglgws-os). Permissions are set up for the installation to be run in the /opt/fourjs/fglgws directory by the "genero" user when the docker container is run.

At the command line type the following command to build the image from your dockerfile:
```
docker build --force-rm \
     --build-arg FGLGWS_PACKAGE=fjs-fglgws-3.10.01-build1486651223-l64xl212.run \
     -t fglgws-base .
```
The build parameter --build-arg specifies the FGLGWS package to be installed in the docker container when created.
Get a list of docker images.
```
docker images
```
Your docker image (fglgws-base) is shown in the list.

What to do next:

Run the docker container and check Genero BDL license status. See Run docker container.