Docker container for local development of the site

### Description
Currently, the site requires specific versions of technologies such as `hugo extended`, `GO`, etc, to be able to develop locally by the contributors. This often creates problems in one or the other dependencies and the users face problem in developing the site locally.

### Suggestion
Dockerization of the whole site will allow users to develop the site locally with just a single command, without even installing any specific versions of the dependencies. This will make the development process much faster.

### Additional Context
The right directories can be containerized so that the contributors can directly see their changes being developed locally.

cc @jayesh9747