diff --git a/backend/Dockerfile b/backend/Dockerfile
index a32e485..54a5631 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -54,7 +54,8 @@ COPY --chown=appuser:appuser alembic/ ./alembic/
 COPY --chown=appuser:appuser scripts/ ./scripts/
 RUN chmod +x /app/scripts/*.py /app/scripts/docker-entrypoint.sh
 
-# Copy environment example
+# Copy environment files
+COPY --chown=appuser:appuser .env ./.env
 COPY --chown=appuser:appuser .env.example ./.env.example
 COPY --chown=appuser:appuser pyproject.toml ./
 
diff --git a/backend/app/core/settings.py b/backend/app/core/settings.py
index 67c71b3..ce6a5ed 100644
--- a/backend/app/core/settings.py
+++ b/backend/app/core/settings.py
@@ -19,13 +19,16 @@ class Settings(BaseSettings):
     JWT_SECRET_KEY: str = "change-me-in-production"
     
     # Database - Primary (mtgonline app)
-    DATABASE_URL: str = "postgresql+asyncpg://postgres:postgres@localhost:5432/mtgo_platform"
+    DATABASE_URL: str = "postgresql+asyncpg://postgres:postgres@postgres_platform:5432/mtgo_platform"
     
     # Database - Secondary (mtgjson data)
-    MTG_DATABASE_URL: str = "postgresql+asyncpg://postgres:postgres@localhost:5432/mtg_data"
+    MTG_DATABASE_URL: str = "postgresql+asyncpg://postgres:postgres@postgres_mtgdata:5432/mtgdata"
+    
+    # Database - Mirror
+    MTG_MIRROR_DATABASE_URL: str = "postgresql+asyncpg://postgres:postgres@postgres_mirror:5432/mtgo_mirror"
     
     # Redis
-    REDIS_URL: str = "redis://localhost:6379/0"
+    REDIS_URL: str = "redis://redis:6379/0"
     
     # JWT Configuration
     JWT_ALGORITHM: str = "HS256"