Development dependencies

Development Dependency

1. Failed to build gem native extension: json

Solution: Install the library needed: sudo apt-get install libgmp3-dev

2. Failed to build gem native extension: rmagick

Solution: sudo apt-get install libmagickwand-dev

3. Failed to build gem native extension: mysql2

Solution: sudo apt-get install libmysqlclient-dev

4. ExecJS::RuntimeUnavailable: Could not find a JavaScript runtime

Solution: sudo apt-get install nodejs

5. Failed to build gem native extension: pg

Solution: sudo apt-get install libpq-dev