Add Github OAuth feature to backend application

docker-compose.yml

@@ -10,20 +10,33 @@ services:
     ports:
       - "7896:7896"
     environment:
-#      - frontend.main-page.url=http://localhost:3000
-#      - cors.allowed-origin=http://localhost:3000
+      ## Required if frontend and backend are different
+      #- frontend.main-page.url=http://localhost:3000
+      #- cors.allowed-origin=http://localhost:3000
+      ## Database Configuration
       - spring.datasource.url=jdbc:mysql://mysqldb:3306/lpvs
       - spring.datasource.username=root
       - spring.datasource.password=
-      ## github data
+      ## Github data for fetching code
       - github.login=
       - github.token=
       - github.api.url=https://api.github.com 
       - github.secret=LPVS
+      ## Google OAuth Login
       - spring.security.oauth2.client.registration.google.client-id=GOOGLE_CLIENT_ID
       - spring.security.oauth2.client.registration.google.client-secret=GOOGLE_CLIENT_SECRET
       - spring.security.oauth2.client.registration.google.redirect-uri=http://localhost:7896/login/oauth2/code/google
       - spring.security.oauth2.client.registration.google.scope=profile, email
+      ## Github OAuth Login
+      - spring.security.oauth2.client.registration.github.client-id=GITHUB_CLIENT_ID
+      - spring.security.oauth2.client.registration.github.client-secret=GITHUB_CLIENT_SECRET
+      - spring.security.oauth2.client.registration.github.redirect-uri=http://localhost:7896/login/oauth2/code/github
+      - spring.security.oauth2.client.registration.github.scope=user
+      ## Github Enterprise Configuration if necessary
+      #- spring.security.oauth2.client.provider.github.authorization-uri=https://HOSTNAME/login/oauth/authorize
+      #- spring.security.oauth2.client.provider.github.token-uri=https://HOSTNAME/login/oauth/access_token
+      #- spring.security.oauth2.client.provider.github.user-info-uri=https://HOSTNAME/api/v3/user
+
     depends_on:
       mysqldb:
         condition: service_healthy

src/main/java/com/lpvs/auth/OAuthAttributes.java

@@ -36,6 +36,15 @@ public enum OAuthAttributes {
         memberProfile.setName((String) kakaoProfile.get("nickname"));
         memberProfile.setEmail((String) kakaoAccount.get("email"));
         return memberProfile;
+    }),
+
+    GITHUB("github", (attributes) -> {
+        MemberProfile memberProfile = new MemberProfile();
+        memberProfile.setName((String) attributes.get("name"));
+        // TODO: The email from Github can be null, so place the login value for a while.
+        //       Changing unique key from the member table is required.
+        memberProfile.setEmail((String) attributes.get("login"));
+        return memberProfile;
     });
 
     private final String registrationId;