Changed the default config location to /etc/dragoon/config.toml; added a CLI option (-c) to specify a different config file.

src/test/java/tech/bitgoblin/config/CmdTest.java

@@ -0,0 +1,17 @@
+package tech.bitgoblin.config;
+
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+import org.apache.commons.cli.ParseException;
+
+public class CmdTest {
+
+  @Test
+  public void shouldDefaultToEtc() throws ParseException {
+    Cmd cmd = new Cmd(new String[]{});
+    assertTrue(cmd.getConfigPath().equals("/etc/dragoon/config.toml"));
+  }
+
+}