misc: enhance modularity by changing the code architecture

.Dockerignore

.dockerignore

.env

.eslintignore

.eslintrc.json

Dockerfile

README.md

build.py

documentation.md

package-lock.json

package.json

src/app.ts

src/controllers/plugins.controller.ts

src/index.ts

src/interfaces/plugins.ts

src/routes.ts

src/server.ts

src/services/certificate_manager.ts

src/services/file_manager.service.ts

src/services/plugins_manager.service.ts