Stress Classification Service with Random Forest

[create-issue-branch[bot]]

Branch 17-stress_classification_service_with_random_forest created!

[albugowy15]

• [x] create and compile proto file
• [x] create Database class and connect to DB
• [x] Implement the ClassificationServicer
• [x] Load the random forest model
• [x] Do the stress level prediction
• [x] Update Dockerfile