update gitignore add readme to empties

update gitignore and add readme to:
logs/data/certs

.gitignore

@@ -15,6 +15,11 @@ tests/*
 !tests/pytest.ini
 
 # Ignore logs/data/certs
-logs/
-data/
-certs/
+logs/*
+data/*
+certs/*
+
+# Except README in logs/data/certs
+!logs/README.md
+!data/README.md
+!certs/README.md

certs/README.md

@@ -0,0 +1,3 @@
+# Certs Directory
+
+Place your created certs in this directory

data/README.md

@@ -0,0 +1,3 @@
+# Data Directory
+
+Where Bumper executes persistent data will be stored here (bumper.db)

logs/README.md

@@ -0,0 +1,3 @@
+# Logs Directory
+
+When Bumper executes, logs will be created here