Integrate .gitignore into root project directory (#280)

* Add .gitignore into root project directory(#279)

* chore: just combine front, back ignore file

- remove .gitignore in each folder

* chore: fix legacy file & seperate OD part in gitignore

backend/.gitignore → .gitignore

@@ -1,42 +1,46 @@
-# compiled output
-/dist
-/node_modules
-
 # Logs
 logs
 *.log
 npm-debug.log*
-pnpm-debug.log*
 yarn-debug.log*
 yarn-error.log*
+pnpm-debug.log*
 lerna-debug.log*
 
-# OS
-.DS_Store
+node_modules/
+dist/
+dist-ssr/
+*.local
 
-# Tests
-/coverage
-/.nyc_output
-
-# IDEs and editors
-/.idea
+# Editor directories and files
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+.idea
 .project
 .classpath
 .c9/
 *.launch
 .settings/
 *.sublime-workspace
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
+
+# OS
+.DS_Store
 
-# IDE - VSCode
-.vscode/*
-!.vscode/settings.json
-!.vscode/tasks.json
-!.vscode/launch.json
-!.vscode/extensions.json
 
-# Sqlite
-dev.db
-dev.db-journal
+# Environment
+.env
+.env.development
+.env.sentry-build-plugin
 
-# env
-.env
+
+# Tests
+coverage/
+.nyc_output/