leleobhz suggestion of ALPINE_VERSION variable enclosure

AlexisPPLIN · AlexisPPLIN · commit 539139d2eee8 · 2023-10-02T20:41:55.000+02:00
diff --git a/Dockerfile b/Dockerfile
@@ -2,7 +2,7 @@
 
 ARG ALPINE_VERSION=3.18
 
-FROM alpine:$ALPINE_VERSION
+FROM alpine:${ALPINE_VERSION}
 
 RUN apk add --no-cache curl jq
 
