feat: rework repo format

.gitlab-ci.yml

@@ -7,7 +7,8 @@ release-deb:
   variables:
     DOCKER_BUILDKIT: 1
   script:
-    - docker build . -t freerad_builder:3.2.x -f Dockerfile_build
+    - cd build
+    - docker build . -t freerad_builder:3.2.x -f Dockerfile
     - docker run -e DEB_USER=${DEB_USER} -e DEB_PASS="${DEB_PASS}" freerad_builder:3.2.x ./upload.sh
   only:
     - main

README.md

@@ -2,6 +2,7 @@
 
 build:
 ```bash
+cd build
 docker build . -t freerad_builder:3.2.x -f Dockerfile_build
 docker run -e DEB_USER=${DEB_USER} DEB_PASS="${DEB_PASS}" freerad_builder:3.2.x ./upload.sh
 ```