Allow the user to config the apt source in build.sh

dockerfiles/build.sh

@@ -1,6 +1,10 @@
 # Configs of the docker images, you might have specify your own configs here.
+
 # type of database, support 'mysql' and 'postgres'
 DB_TYPE="postgres"
+# apt source, you can select 'nchc' or 'aliyun' according to your network.
+APT_SOURCE="nchc"
+
 DB_PASSWORD="YOUR_DB_PASSWORD"
 DB_RUN_NAME="YOUR_DB_RUN_NAME"
 HOST_PORT="YOUR_HOST_PORT"
@@ -9,6 +13,8 @@ HOST_PORT="YOUR_HOST_PORT"
 sed -i "s/THE_DB_PASSWORD/$DB_PASSWORD/g" images/$DB_TYPE/Dockerfile
 # Replace the database root password in gogits image deploy.sh file. 
 sed -i "s/THE_DB_PASSWORD/$DB_PASSWORD/g" images/gogits/deploy.sh
+# Replace the apt source in gogits image Dockerfile. 
+sed -i "s/#$APT_SOURCE#//g" images/gogits/Dockerfile
 # Replace the database type in gogits image deploy.sh file. 
 sed -i "s/THE_DB_TYPE/$DB_TYPE/g" images/gogits/deploy.sh