Changed Dovecot Base to Bullseye again (Self compile)

data/Dockerfiles/dovecot/Dockerfile

@@ -3,9 +3,10 @@ LABEL maintainer "The Infrastructure Company GmbH GmbH <info@servercow.de>"
 
 # renovate: datasource=github-releases depName=tianon/gosu versioning=semver-coerced extractVersion=^(?<version>.*)$
 ARG GOSU_VERSION=1.16
+ARG DOVECOT_VERSION=2.3.20
+ARG PIGEONHOLE_VERSION=0.5.20
+ENV LC_ALL C
 
-ENV LANG C.UTF-8
-ENV LC_ALL C.UTF-8
 
 # Add groups and users before installing Dovecot to not break compatibility
 RUN addgroup -g 5000 vmail \
@@ -98,19 +99,22 @@ RUN addgroup -g 5000 vmail \
   supervisor \
   tzdata \
   wget \
-  dovecot \
-  dovecot-dev \
-  dovecot-lmtpd \
-  dovecot-lua \
-  dovecot-ldap \
-  dovecot-mysql \
-  dovecot-sql \
-  dovecot-submissiond \
-  dovecot-pigeonhole-plugin \
-  dovecot-pop3d \
-  dovecot-fts-solr \
-  && arch=$(arch | sed s/aarch64/arm64/ | sed s/x86_64/amd64/) \
-  && wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$arch" \
+  git \
+  bison \
+  flex \
+  build-essential \
+  autoconf \
+  automake \
+  libtool \
+  make \
+  default-libmysqlclient-dev \
+  libicu-dev \
+  zlib1g-dev \
+  pkg-config \
+  libsqlite3-dev \
+  liblua5.3-dev \
+  && dpkgArch="$(dpkg --print-architecture | awk -F- '{ print $NF }')" \
+  && wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$dpkgArch" \
   && chmod +x /usr/local/bin/gosu \
   && gosu nobody true
 

data/conf/dovecot/dovecot.conf

@@ -241,8 +241,8 @@ plugin {
   mail_crypt_global_public_key = </mail_crypt/ecpubkey.pem
   mail_crypt_save_version = 2
 
-  # Enable compression while saving, lz4 Dovecot v2.2.11+
-  zlib_save = lz4
+  # Enable compression while saving, zstd Dovecot v2.3.17+
+  zlib_save = zstd
 
   mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename
   mail_log_fields = uid box msgid size