Add docker image

.gitmux.conf.docker

@@ -0,0 +1,28 @@
+tmux:
+    symbols:
+        branch: "B:"
+        hashprefix: ':'
+        ahead: '->'
+        behind: '<-'
+        staged: ''
+        conflict: 'X'
+        modified: '+'
+        untracked: '...'
+        stashed: '[]'
+        clean: '$'
+    styles:
+        clear: '#[fg=default]'
+        state: '#[fg=red,bold]'
+        branch: '#[fg=white,bold]'
+        remote: '#[fg=cyan]'
+        staged: '#[fg=green,bold]'
+        conflict: '#[fg=red,bold]'
+        modified: '#[fg=red,bold]'
+        untracked: '#[fg=magenta,bold]'
+        stashed: '#[fg=cyan,bold]'
+        clean: '#[fg=green,bold]'
+        divergence: '#[fg=default]'
+    layout: ["#[bold]", branch, remote-branch, divergence, ' - ', flags]
+    options:
+        branch_max_len: 30
+        branch_trim: right