docs: update .env.example

Author: americano212

.env.example

@@ -1,41 +1,58 @@
-PORT= 
-NODE_ENV= 
-BCRYPT_SALT= 
-
-SUPER_ADMIN_EMAIL=
-SUPER_ADMIN_PASSWORD=
-SUPER_ADMIN_USERNAME=
-
-# development
-DEV_DB_HOST=
-DEV_DB_USER=
-DEV_DB_PASSWORD=
-DEV_DB_NAME=
-DEV_DB_PORT=
-
-DEV_JWT_ACCESS_SECRET=
-DEV_JWT_REFRESH_SECRET=
-
-# production
-DB_HOST=
-DB_USER=
-DB_PASSWORD=
-DB_NAME=
-
-KAKAO_CLIENT_ID=
-KAKAO_CLIENT_SECRET=
-KAKAO_CALLBACK_URL=
-
-NAVER_CLIENT_ID=
-NAVER_CLIENT_SECRET=
-NAVER_CALLBACK_URL=
-
-GOOGLE_CLIENT_ID=
-GOOGLE_CLIENT_SECRET=
-GOOGLE_CALLBACK_URL=
-
-GITHUB_CLIENT_ID=
-GITHUB_CLIENT_SECRET=
-GITHUB_CALLBACK_URL=
-
+PORT=8081
+NODE_ENV='development'
+
+# production
+DB_HOST=
+DB_USER=
+DB_PASSWORD=
+DB_NAME=
+DB_PORT=
+
+# development
+DEV_DB_HOST='localhost'
+DEV_DB_USER='root'
+DEV_DB_PASSWORD='mysql'
+DEV_DB_NAME='docker-mysql-db'
+DEV_DB_PORT=33060
+
+# test
+TEST_DB_HOST='localhost'
+TEST_DB_USER='root'
+TEST_DB_PASSWORD='mysql'
+TEST_DB_NAME='docker-mysql-db'
+TEST_DB_PORT=33061
+
+# ------------------------------------------------------------------------------------
+# Hashing
+BCRYPT_SALT=
+
+# Seeding
+SUPER_ADMIN_EMAIL=
+SUPER_ADMIN_PASSWORD=
+SUPER_ADMIN_USERNAME=
+
+# JWT Key
+JWT_ACCESS_SECRET=
+JWT_REFRESH_SECRET=
+DEV_JWT_ACCESS_SECRET=
+DEV_JWT_REFRESH_SECRET=
+
+# OAuth
+KAKAO_CLIENT_ID=
+KAKAO_CLIENT_SECRET=
+KAKAO_CALLBACK_URL=
+
+NAVER_CLIENT_ID=
+NAVER_CLIENT_SECRET=
+NAVER_CALLBACK_URL=
+
+GOOGLE_CLIENT_ID=
+GOOGLE_CLIENT_SECRET=
+GOOGLE_CALLBACK_URL=
+
+GITHUB_CLIENT_ID=
+GITHUB_CLIENT_SECRET=
+GITHUB_CALLBACK_URL=
+
+# 3rd-Party
 SLACK_WEBHOOK_URL=