Docker: Alpine 3.15 (#3996)

Alpine 3.15 with PHP 8.0.13 and Apache 2.4.51
https://alpinelinux.org/posts/Alpine-3.15.0-released.html

CHANGELOG.md

@@ -1,4 +1,4 @@
-# FreshRSS changelog
+# FreshRSS changelog
 
 ## 2021-XX-XX FreshRSS 1.19.0-dev
 
@@ -20,8 +20,8 @@
 * Deployment
 	* Docker: development image `:oldest` is now based on `alpine:3.5` with PHP 7.0.33 and Apache 2.4.35 [#3666](https://github.com/FreshRSS/FreshRSS/pull/3666)
 	* Docker: default image updated to Debian 11 Bullseye with PHP 7.4.21 and Apache 2.4.48 [#3782](https://github.com/FreshRSS/FreshRSS/pull/3782)
-	* Docker: alternative image updated to Alpine 3.14 with PHP 8.0.10 and Apache 2.4.48 [#3715](https://github.com/FreshRSS/FreshRSS/pull/3715)
-	* Docker: only add the crontab when CRON_MIN is set.
+	* Docker: alternative image updated to Alpine 3.15 with PHP 8.0.13 and Apache 2.4.51 [#3996](https://github.com/FreshRSS/FreshRSS/pull/3996)
+	* Docker: only add the crontab when `CRON_MIN` is set [#3927](https://github.com/FreshRSS/FreshRSS/pull/3927)
 	* Images on Docker Hub are automatically scanned for software vulnerabilities
 * UI
 	* New thumbnail and/or summary options for the normal view [#3805](https://github.com/FreshRSS/FreshRSS/pull/3805)

Docker/Dockerfile-Alpine

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-FROM alpine:3.14
+FROM alpine:3.15
 
 ENV TZ UTC
 SHELL ["/bin/ash", "-eo", "pipefail", "-c"]