notes: create promotion.md

Signed-off-by: Thomas Stadler <[email protected]>

notes/promotion.md

@@ -0,0 +1,22 @@
+# promotion
+
+## what
+
+- application version
+- configuration settings
+- static business settings
+- non-static business settings
+
+## how
+
+### environment configuration tool
+
+- kustomize
+- helm
+- jsonnet
+
+### kinds of promotions
+
+- preview environments (short-lived, dynamic, created from pull request)
+- sequential promotion env after env (qa --> staging --> prod)
+- multiple envs in same stage (prod-eu, prod-asia)