refactor: Remove Gitea mysql database

gitea/docker-compose.yml

@@ -1,8 +1,6 @@
 networks:
   web:
     external: true
-  gitea:
-    driver: bridge
 
 volumes:
   gitea-data:
@@ -15,11 +13,8 @@ services:
     environment:
       - USER_UID=1000
       - USER_GID=1000
-      - GITEA__database__DB_TYPE=mysql
+      - DISABLE_REGISTRATION=true
-      - GITEA__database__HOST=db:3306
+      - REQUIRE_SIGNIN_VIEW=true
-      - GITEA__database__NAME=gitea
-      - GITEA__database__USER=gitea
-      - GITEA__database__PASSWD=gitea
     volumes:
       - /etc/timezone:/etc/timezone:ro
       - /etc/localtime:/etc/localtime:ro
@@ -38,20 +33,4 @@ services:
       - "traefik.http.routers.gitea-https.tls.certresolver=letsencrypt"
       - "traefik.http.routers.gitea-https.rule=Host(`${GITEA_HOST}`)"
     networks:
-     - gitea
      - web
-    depends_on:
-      - db
-
-  db:
-    image: mysql:8
-    restart: always
-    environment:
-      - MYSQL_ROOT_PASSWORD=gitea
-      - MYSQL_USER=gitea
-      - MYSQL_PASSWORD=gitea
-      - MYSQL_DATABASE=gitea
-    networks:
-      - gitea
-    volumes:
-      - ./mysql:/var/lib/mysql