nightly tag for docker images

.drone.yml

@@ -1162,7 +1162,7 @@ steps:
     pull: always
     settings:
       auto_tag: false
-      tags: dev-linux-amd64
+      tags: nightly-linux-amd64
       repo: gitea/gitea
       build_args:
         - GOPROXY=https://goproxy.io
@@ -1184,7 +1184,7 @@ steps:
     settings:
       dockerfile: Dockerfile.rootless
       auto_tag: false
-      tags: dev-linux-amd64-rootless
+      tags: nightly-linux-amd64-rootless
       repo: gitea/gitea
       build_args:
         - GOPROXY=https://goproxy.io
@@ -1487,7 +1487,7 @@ steps:
     pull: always
     settings:
       auto_tag: false
-      tags: dev-linux-arm64
+      tags: nightly-linux-arm64
       repo: gitea/gitea
       build_args:
         - GOPROXY=https://goproxy.io
@@ -1509,7 +1509,7 @@ steps:
     settings:
       dockerfile: Dockerfile.rootless
       auto_tag: false
-      tags: dev-linux-arm64-rootless
+      tags: nightly-linux-arm64-rootless
       repo: gitea/gitea
       build_args:
         - GOPROXY=https://goproxy.io