Added tmux and fish

Dockerfile

@@ -4,7 +4,12 @@ COPY ./etc/inputrc /etc/inputrc
 
 # perl is required by git-submodule
 # less makes git log/diff colorful
-RUN apk add --no-cache bash-completion docker-bash-completion openssh-client git perl make vim less htop iftop && \
+RUN apk add --no-cache \
+        openssh-client git perl make less \
+        bash bash-completion docker-bash-completion \
+        vim \
+        htop iftop \
+        tmux fish mdocml-apropos && \
     echo '\
         . /etc/profile ; \
         PS1='\''\[\e[01;33m\][\h \u:\[\e[01;34m\]\w\[\e[01;33m\]]\[\e[00m\]\$ '\'' ; \
@@ -13,6 +18,25 @@ RUN apk add --no-cache bash-completion docker-bash-completion openssh-client git
         alias l="ls -lah" ; \
         alias ll="ls -lh" ; \
     ' >> /etc/bash.bashrc && \
-    ln -sf vim /usr/bin/vi
+    echo '. ~/.bashrc' > /root/.bash_profile && \
+    echo '. /etc/bash.bashrc' > /root/.bashrc && \
+    echo 'set-option -g default-shell /usr/bin/fish' > /root/.tmux.conf && \
+    mkdir -p /root/.config/fish/functions && \
+    echo '\
+        function fish_prompt ;\
+            if not set -q __fish_prompt_hostname ;\
+                set -g __fish_prompt_hostname (hostname) ;\
+            end ;\
+            set_color -o yellow ;\
+            echo -n -s "$USER" @ "$__fish_prompt_hostname" " " ;\
+            set_color -o blue ;\
+            echo -n (prompt_pwd) ;\
+            echo -n " # " ;\
+            set_color normal ;\
+        end ;\
+        \
+        alias l="ls -la" ;\
+    ' > /root/.config/fish/functions/fish_prompt.fish #&& \
+    ln -s vim /usr/local/bin/vi
 
-CMD ["bash", "--rcfile", "/etc/bash.bashrc"]
+CMD ["bash"]