return proper home dir from userdb

Containerfile

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+FROM docker.io/alpine:3.19 as builder
+
+RUN apk --no-cache add \
+  rpcgen \
+  g++ \
+  make \
+  openssl \
+  openssl-dev \
+  lua5.1-dev \
+  libsodium-dev \
+  linux-pam-dev \
+  zlib-dev \
+  bzip2-dev \
+  xz-dev \
+  lz4-dev \
+  icu-dev \
+  inotify-tools-dev
+
+ENV SHA256_SUM_DOVECOT=05b11093a71c237c2ef309ad587510721cc93bbee6828251549fc1586c36502d
+ENV DOVECOT_FILENAME=dovecot-2.3.21.tar.gz
+RUN wget https://www.dovecot.org/releases/2.3/$DOVECOT_FILENAME
+RUN echo "$SHA256_SUM_DOVECOT  $DOVECOT_FILENAME" | sha256sum -c - || exit 1
+RUN mkdir /tmp/dovecot
+RUN tar xzf $DOVECOT_FILENAME -C /tmp/dovecot --strip 1
+
+ENV SHA256_SUM_PIGEONHOLE=1ca71d2659076712058a72030288f150b2b076b0306453471c5261498d3ded27
+ENV PIGEONHOLE_FILENAME=dovecot-2.3-pigeonhole-0.5.21.tar.gz
+RUN wget https://pigeonhole.dovecot.org/releases/2.3/$PIGEONHOLE_FILENAME
+RUN echo "$SHA256_SUM_PIGEONHOLE  $PIGEONHOLE_FILENAME" | sha256sum -c - || exit 1
+RUN mkdir /tmp/pigeonhole
+RUN tar xzf $PIGEONHOLE_FILENAME -C /tmp/pigeonhole --strip 1
+
+RUN cd /tmp/dovecot && \
+  ./configure --prefix '' \
+  --with-notify=inotify \
+  --with-lua \
+  --with-zlib \
+  --with-bzlib \
+  --with-pam \
+  --with-ssl=openssl \
+  --with-sodium \
+  --without-sql \
+  --with-lzma \
+  --with-lz4 \
+  --with-icu \
+  --without-shadow \
+  --with-ssldir=/etc/ssl/mail \
+  --with-rundir=/run/dovecot \
+  --disable-static && \
+  make && \
+  make install
+
+RUN cd /tmp/pigeonhole && \
+  ./configure --prefix '' \
+  --with-dovecot=/lib/dovecot \
+  --disable-static && \
+  make && make install
+
+FROM docker.io/thallian/confd-env:3.19-3.1.6.2
+
+COPY --from=builder /lib/dovecot/ /lib/dovecot/
+COPY --from=builder /libexec/dovecot/ /libexec/dovecot/
+COPY --from=builder /bin/doveadm /bin/doveadm
+COPY --from=builder /bin/doveconf /bin/doveconf
+COPY --from=builder /bin/dsync /bin/dsync
+COPY --from=builder /sbin/dovecot /sbin/dovecot
+COPY --from=builder /bin/sieve* /bin/
+
+RUN apk --no-cache add \
+  libsodium \
+  libbz2 \
+  zlib \
+  xz-libs \
+  lz4-libs \
+  lz4 \
+  linux-pam \
+  openssl \
+  ssmtp \
+  ca-certificates \
+  lua5.1-libs \
+  lua5.1-rapidjson \
+  curl \
+  inotify-tools \
+  libssl3
+
+RUN addgroup -g 150 dovecot
+RUN adduser -u 140 -h /dev/null -H -s /sbin/nologin -D -G dovecot dovecot
+
+RUN addgroup -g 151 dovenull
+RUN adduser -u 141 -h /dev/null -H -s /sbin/nologin -D -G dovenull dovenull
+
+RUN addgroup -g 2222 access
+RUN addgroup dovecot access
+
+RUN addgroup -g 1111 vmail
+RUN adduser -u 1111 -h /var/lib/vmail -D -G vmail vmail
+
+RUN mkdir -p /etc/dovecot/conf.d
+RUN mkdir /var/lib/vmail/sieve-after/
+
+RUN chown -R vmail:vmail /var/lib/vmail/sieve-after/
+
+EXPOSE 143 4190 6334 7777
+
+VOLUME /var/lib/vmail/mail/ /etc/ssl/mail
+
+ADD /rootfs /