FIX: replaced environment with the proper .env file

.gitignore

@@ -0,0 +1 @@
+.env

semaphore-ui/docker-compose.yml

@@ -5,12 +5,8 @@ services:
     restart: unless-stopped
     ports:
       - "3030:3000"
-    environment:
-      SEMAPHORE_DB_DIALECT: sqlite
-      SEMAPHORE_ADMIN: ${ADMIN_USER}
-      SEMAPHORE_ADMIN_PASSWORD: ${ADMIN_PASS}
-      SEMAPHORE_ADMIN_NAME: ${ADMIN_NAME}
-      SEMAPHORE_ADMIN_EMAIL: ${ADMIN_EMAIL}
+    env_file:
+      - .env
     volumes:
       - semaphore-data:/var/lib/semaphore
       - semaphore-config:/etc/semaphore