Add docker file to create docker image

[PrathibaJee]

Include docker file to create docker image

• [ ] Create docker file including the following :

1. Create app directory
2. performs npm install in the impl/client 2.1. use a wildcard to ensure both package.json AND package-lock.json are copied 2.2. RUN npm install
3. builds the impl/client folder using npm run build (This will create a build folder in the impl/client which will be utilized by the server in impl/server)
4. performs npm install in the impl/server 4.1. use a wildcard to ensure both package.json AND package-lock.json are copied 4.2. RUN npm install
5. Command to start the application

• [ ] Test whether this docker file is creating a docker image