Feature/eslint configuration

[ozgunbal]

There too many changes for sinle PR. Split the implementation into specific smaller commits. Those can be different topics and PR's:

• Add ESLint configuration
• Refactor components according to ESLint rules
• Add bootstrap
• Add hot-loader
• etc.

[ozgunbal]

Put more effort on commit messages. Generally they starts with a verb . Again: https://www.freecodecamp.org/news/writing-good-commit-messages-a-practical-guide/