Rename project from "EventSpace" to "App" across files

Updated project name references in configuration, scripts, and code. This includes changes to database URLs, Docker commands, environment variables, and displayed API titles. Ensures consistency with the new project name "App".

.env.template

@@ -1,11 +1,11 @@
 # Common settings
-PROJECT_NAME=EventSpace
+PROJECT_NAME=App
 VERSION=1.0.0
 
 # Database settings
 POSTGRES_USER=postgres
 POSTGRES_PASSWORD=postgres
-POSTGRES_DB=eventspace
+POSTGRES_DB=App
 POSTGRES_HOST=db
 POSTGRES_PORT=5432
 DATABASE_URL=postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@${POSTGRES_HOST}:${POSTGRES_PORT}/${POSTGRES_DB}