Translated comments form spanish to english

Dockerfile

@@ -2,23 +2,24 @@ FROM alpine:3.4
 
 MAINTAINER José Carlos Bernárdez "jkarlosb@gmail.com"
 
-# --no-cache es nuevo en Alpine 3.3 y evita tener que utilizar
-# --update + rm -rf /var/cache/apk/* (borrar el caché)
+# "--no-cache" is new in Alpine 3.3 and it avoid using
+# "--update + rm -rf /var/cache/apk/*" (to remove cache)
 RUN apk add --no-cache \
 # openssh=7.2_p2-r1 \
   openssh \
 # git=2.8.3-r0
   git
 
-# Generamos las claves del servidor
+# Key generation on the server
 RUN ssh-keygen -A
 
-# Para que ssh se auto-arranque
+# SSH autorun
 # RUN rc-update add sshd
 
 WORKDIR /git-server/
 
-# Con -D no creamos password, con -s le cambiamos la shell
+# -D flag avoids password generation
+# -s flag changes user's shell
 RUN mkdir /git-server/keys \
   && adduser -D -s /usr/bin/git-shell git \
   && echo git:12345 | chpasswd \
@@ -31,7 +32,7 @@ RUN mkdir /git-server/keys \
 # More info: https://git-scm.com/docs/git-shell
 COPY git-shell-commands /home/git/git-shell-commands
 
-# En sshd_config habilitamos acceso por key y deshabilitamos por password
+# sshd_config file is edited for enable access key and disable access password
 COPY sshd_config /etc/ssh/sshd_config
 COPY start.sh start.sh
 

start.sh

@@ -2,8 +2,8 @@
 
 cd /home/git
 
-# Si hay alguna clave pública en la carpeta de keys
-# copia su contenido en authorized_keys
+# If there is some public key in keys folder
+# then it copies its contain in authorized_keys file
 if [ "$(ls -A /git-server/keys/)" ]; then
   cat /git-server/keys/*.pub > .ssh/authorized_keys
   chown -R git:git .ssh
@@ -11,5 +11,5 @@ if [ "$(ls -A /git-server/keys/)" ]; then
   chmod -R 600 .ssh/*
 fi
 
-# Bandera -D para que no se ejecute como demonio
+# -D flag avoids executing sshd as a daemon
 /usr/sbin/sshd -D