Add translation support

docker/docker-compose.yml

@@ -7,7 +7,9 @@ services:
     ports:
       - "8080:80"
     environment: 
-      - VITE_BACKEND_DOMAIN=localhost:7000
-      - VITE_INSTANCE_DOMAIN=localhost:80
-      - VITE_HTTPS=false
+      - SAFETWITCH_BACKEND_DOMAIN=localhost:7000
+      - SAFETWITCH_INSTANCE_DOMAIN=localhost:80
+      - SAFETWITCH_HTTPS=false
+      - SAFETWITCH_DEFAULT_LOCALE=en
+      - SAFETWITCH_FALLBACK_LOCALE=ja