Added option to configure the source and target branch

config.go

@@ -3,15 +3,19 @@ package main
 import "os"
 
 type config struct {
-	HostName   string
-	AppName    string
-	PrivateKey string
+	HostName     string
+	AppName      string
+	PrivateKey   string
+	LocalBranch  string
+	RemoteBranch string
 }
 
 func readConfig() config {
 	return config{
-		HostName:   os.Getenv("INPUT_HOST"),
-		AppName:    os.Getenv("INPUT_APP"),
-		PrivateKey: os.Getenv("INPUT_PRIVATE-KEY"),
+		HostName:     os.Getenv("INPUT_HOST"),
+		AppName:      os.Getenv("INPUT_APP"),
+		PrivateKey:   os.Getenv("INPUT_PRIVATE-KEY"),
+		LocalBranch:  os.Getenv("INPUT_SOURCE-BRANCH"),
+		RemoteBranch: os.Getenv("INPUT_REMOTE-BRANCH"),
 	}
 }