enable versioning from build-arguments and set default to 5.9

417-72KI · 417-72KI · commit fd2adebb46f6 · 2023-10-30T00:24:35.000+09:00
diff --git a/Dockerfile b/Dockerfile
@@ -1,4 +1,5 @@
-FROM swift:5.7.0-focal
+ARG SWIFT_VERSION=5.9
+FROM swift:${SWIFT_VERSION}-focal
 
 MAINTAINER Orta Therox
 
