Update

drone.yml

     username: { from_secret: reg-user }
     password: { from_secret: reg-pass }
     repo: reg.unino.de/develop/debian-${DRONE_REPO_NAMESPACE}-${DRONE_REPO_NAME}
-    #mirror: registry-1.docker.io/library/debian:stable-slim
-    bip: 172.17.0.1/16 # only effective when bridge not yet existing
+    #mirror: registry-1.docker.io
+    bip: 172.17.0.1/16 # set bridge if non-existent
     context: /drone # defaults to root of git repo
-    #custom_dns: 127.0.0.11 # defaults to google dns 
+    #custom_dns: 127.0.0.11 # defaults to 8.8.8.8 and 8.8.4.4 
     storage_driver: overlay2 # aufs, overlay or vfs
     #debug: true
     #launch_debug: true
     target: builder # Dockerfile build target e.g. builder, debug, production
     dockerfile: Dockerfile
-    auto_tag: true
-    auto_tag_suffix: -linux-amd64
+    auto_tag: false
+    auto_tag_suffix: linux-amd64
     force_tag: true
     tags: [ latest, builder ]
-    build_args:
+    build_args: # custom args for docker build, e.g. additional BUILD_DEPS
       - BUILD_DEPS=libhidapi-dev libssl-dev zip