SYS-654 fix updated dovecot build (#209)

Author: instantlinux

images/dovecot/Dockerfile

@@ -9,7 +9,7 @@ LABEL org.opencontainers.image.authors="Rich Braun docker@instantlinux.net" \
     org.label-schema.vcs-url=https://github.com/instantlinux/docker-tools
 
 ARG DOVECOT_VERSION=2.4.1-r2
-ARG MKCERT_SHA=24b6988d1709e71c24dcf94ffce5db93bd2e89dc5cbec1ac3c173de5274b68dd
+ARG MKCERT_SHA=d1efad065f9ef34da372847ff4a4d5ffd86b97410b303d8a43ea25aa2119c86d
 
 ENV LDAP_SECRETNAME=ldap-ro-password \
     SSL_DH=
@@ -19,7 +19,7 @@ RUN echo '@old http://dl-cdn.alpinelinux.org/alpine/v3.11/main' \
       >>/etc/apk/repositories && \
     apk add --no-cache dovecot=$DOVECOT_VERSION dovecot-ldap=$DOVECOT_VERSION \
       procmail@old && \
-    rm /etc/ssl/dovecot/server.* && cd /usr/local/bin && \
+    cd /usr/local/bin && \
     wget -q https://raw.githubusercontent.com/dovecot/core/release-2.4.1/doc/mkcert.sh && \
     echo "$MKCERT_SHA  mkcert.sh" | sha256sum -c && \
     chmod 755 /usr/local/bin/mkcert.sh