Use repository stable

Alpine's Edge was used when a newer git version was needed. Now the
stable one is new enough

Author: cpina

Dockerfile

@@ -1,6 +1,6 @@
 FROM alpine:latest
 
-RUN apk add --no-cache --repository=http://dl-cdn.alpinelinux.org/alpine/edge/main git
+RUN apk add --no-cache git
 
 COPY entrypoint.sh /entrypoint.sh