Exclude IntelliJ IDEA run configurations from gitignore

.gitignore

@@ -1,26 +1,27 @@
-# +---------------------+
-# + Project Environment +
-# +---------------------+
+# +--------------+
+# + Apache Maven +
+# +--------------+
 /target/
 
-# +------+
-# + Java +
-# +------+
-*.class
-*.jar
-
-# JVM crash logs
-# http://www.java.com/en/download/help/error_hotspot.xml
-hs_err_pid*
-
 # +---------------+
 # + IntelliJ IDEA +
 # +---------------+
 # https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
 out/
 .idea/*
+!.idea/runConfigurations
 !.idea/compiler.xml
 !.idea/encodings.xml
 !.idea/misc.xml
 !.idea/modules.xml
 !.idea/vcs.xml
+
+# +------+
+# + Java +
+# +------+
+*.class
+*.jar
+
+# JVM crash logs
+# http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*