Adding a configuration file that specified the default data directory.

sample-ind.conf

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+; Example configuration for ind.
+;
+; The default location for this file is in ~/.ind/ind.conf on POSIX OSes.
+; The default location of this file can be overwritten by specifying the
+; --configfile= flag when starting ind.
+;
+; Boolean values can be specified as true/false or 1/0.
+
+[Application Options]
+
+; The directory that ind stores all wallet, chain, and network related data
+; within The default is ~/.ind/data on POSIX OSes. Environment variables are expanded so they may be used.
+; datadir=~/.ind/data
+
+; The directory that logs are stored in. The logs are auto-rotated by default.
+; Rotated logs are compressed in place.
+; logdir=~/.ind/logs
+
+; Number of logfiles that the log rotation should keep. Setting it to 0 disables deletion of old log files.
+; maxlogfiles=3
+;
+; Max log file size in MB before it is rotated.
+; maxlogfilesize=10