acme: corrected acme-tiny download path

data/Dockerfiles/acme/Dockerfile

@@ -15,7 +15,7 @@ RUN apk upgrade --no-cache \
   tini \
   tzdata \
   python3 \
-  acme-tiny --repository=http://dl-cdn.alpinelinux.org/alpine/edge/testing/
+  acme-tiny --repository=http://dl-cdn.alpinelinux.org/alpine/edge/community/
 
 COPY acme.sh /srv/acme.sh
 COPY functions.sh /srv/functions.sh