feat: .env 파일 사용 (#196)

Author: jayn2u

.gemini/styleguide.md

@@ -1,22 +1,14 @@
-# Copilot instructions
-
 - You must respond in Korean for all answers, regardless of the input language.
 - Do not write any comments in code blocks, even if asked to do so.
 - Do not use wildcard when importing libraries
 - When you write reviews for pull request, specific review will very helpful for my team.
 - Suggest based on logical reasons.
 
-## Commenting Convention
-
 - Comments should be written in a single line whenever possible.
 - Each comment must include the author's name and the date.
 - Use IntelliJ's default `FIX ME` comment format.
   - Use this for parts of the code where there may be a potential issue but immediate exception handling is unnecessary.
   - Also use this for parts that are not yet finalized due to unclear business requirements.
 
-## Test Code Convention
-
 - Test method names must be written in **English**.
 - But if the codes is related to test, write the comment for "given, when, then".
-
-Please follow these conventions when reviewing or suggesting changes to the code.

.gitignore

@@ -41,3 +41,6 @@ out/
 
 ### Docker Tar files ###
 /eat-ssu.tar
+
+### env file ###
+.env

src/main/resources/application.yml

@@ -1,6 +1,8 @@
 spring:
   profiles:
     active: local
+  config:
+    import: optional:file:.env[.properties]
 
 user:
   forbidden-nicknames:

src/test/resources/application.yml

@@ -1,3 +1,5 @@
 spring:
   profiles:
-    active: test
+    active: test
+  config:
+    import: optional:file:.env[.properties]