docs: add env-example

Author: RamezTaher

env-example

@@ -0,0 +1,40 @@
+NODE_ENV=development
+APP_PORT=5000
+APP_NAME="NestJS API"
+API_PREFIX=api
+FRONTEND_DOMAIN=http://localhost:3000
+BACKEND_DOMAIN=http://localhost:5000
+
+DATABASE_TYPE=mysql
+DATABASE_URL=
+DATABASE_HOST=localhost
+DATABASE_PORT=3306
+DATABASE_USERNAME=
+DATABASE_PASSWORD=
+DATABASE_NAME=test
+DATABASE_SYNCHRONIZE=true
+
+
+AUTH_JWT_SECRET=
+AUTH_JWT_TOKEN_EXPIRES_IN=
+AUTH_REFRESH_SECRET=
+AUTH_REFRESH_TOKEN_EXPIRES_IN=
+
+
+
+MAILER_HOST=
+MAILER_PORT=
+MAILER_USER=
+MAILER_PASSWORD=
+MAILER_IGNORE_TLS=false
+MAILER_SECURE=false
+MAILER_REQUIRE_TLS=false
+[email protected]
+MAILER_DEFAULT_NAME=
+MAILER_CLIENT_PORT=1080
+
+
+
+GOOGLE_CLIENT_ID= 
+GOOGLE_CLIENT_SECRET= 
+CALL_BACK_URL=