Frontend: .env file and using environment variables in the code

[gokayyildiz]

Issue Description

During the implementation of the first Milestone outputs, we also thought that it would be better if we use .env file and environment variables in the code instead of statically declaring the API URLs or other kinds of things similar to this. So, we decided to implement this feature in the meeting. So, I will do this implementation

Step Details

Steps that will be performed:

• [x] research on how to use environment variables
• [x] declare environment variables
• [x] share the .env file with the frontend team

Final Actions

Reviewed by the team members and merged

Deadline of the Issue

08.11.2022 - Tuesday - 23.59

Reviewer

Altay Acar

Deadline for the Review

09.11.2022 - Wednesday - 23.59

[gokayyildiz]

Reviewed by @xltvy and tested by all the other frontend team members, now we can close the issue.