Upgrading to Alpine 3.15.4

Dockerfile

@@ -1,11 +1,11 @@
-FROM alpine:3.15.3
+FROM alpine:3.15.4
 
 # Mailcatcher version
 ARG MAILCATCHER_VERSION=0.8.2
 
 # Label
 LABEL maintainer="[email protected]" \
-    version="1.7.5" \
+    version="1.7.6" \
     description="Debug emails with style using mailcatcher a super simple SMTP server which catches messages sent to it and displays them in a web interface" \
     org.label-schema.name="mailcatcher" \
     org.label-schema.version="${MAILCATCHER_VERSION}" \

docs/index.md

@@ -12,7 +12,7 @@ Docker Mailcatcher using the latest Alpine Linux.
 
 | component     | version  |
 |---------------|----------|
-| Alpine Linux  | 3.15.3   |
+| Alpine Linux  | 3.15.4   |
 | MailCatcher   | 0.8.2    |
 | Ruby          | 3.0.3-r0 |
 | SQLite        | 3.36.0-r0 |
@@ -152,6 +152,7 @@ MailCatcher is running in `foreground` mode. This does not change MailCatcher be
 | 1.7.3   | 2022-03-18 | Fixing [CVE-2022-0778](https://security.alpinelinux.org/vuln/CVE-2022-0778) once for all. In the previous versions, Libretls was outdated and offered a way to exploit CVE-2022-0778 |
 | 1.7.4   | 2022-03-23 | Upgrading to Alpine Linux 3.15.2 which includes a fix for libretls [CVE-2022-0778](https://security.alpinelinux.org/vuln/CVE-2022-0778) and reverting to the default build process |
 | 1.7.5   | 2022-03-31 | Upgrading to Alpine Linux 3.15.3 |
+| 1.7.6   | 2022-04-05 | Upgrading to Alpine Linux 3.15.4 |
 
 ## Wanna contribute?