Introduce .env for docker-compose examples (Closes #815)

Introduce .env for docker-compose examples

docker-compose.yml.dist

@@ -1,11 +1,10 @@
 version: '2'
-
 services:
   mail:
     image: tvial/docker-mailserver:latest
-    hostname: mail
-    domainname: domain.com
-    container_name: mail
+    hostname: ${HOSTNAME}
+    domainname: ${DOMAINNAME}
+    container_name: ${CONTAINER_NAME}
     ports:
     - "25:25"
     - "143:143"
@@ -16,18 +15,61 @@ services:
     - mailstate:/var/mail-state
     - ./config/:/tmp/docker-mailserver/
     environment:
-    - ENABLE_SPAMASSASSIN=1
-    - ENABLE_CLAMAV=1
-    - ENABLE_FAIL2BAN=1
-    - ONE_DIR=1
-    - DMS_DEBUG=0
+    - DMS_DEBUG=${DMS_DEBUG}
+    - ENABLE_CLAMAV=${ENABLE_CLAMAV}
+    - ONE_DIR=${ONE_DIR}
+    - ENABLE_POP3=${ENABLE_POP3}
+    - ENABLE_FAIL2BAN=${ENABLE_FAIL2BAN}
+    - ENABLE_MANAGESIEVE=${ENABLE_MANAGESIEVE}
+    - OVERRIDE_HOSTNAME=${OVERRIDE_HOSTNAME}
+    - POSTMASTER_ADDRESS=${POSTMASTER_ADDRESS}
+    - POSTSCREEN_ACTION=${POSTSCREEN_ACTION}
+    - SMTP_ONLY=${SMTP_ONLY}
+    - SSL_TYPE=${SSL_TYPE}
+    - PERMIT_DOCKER=${PERMIT_DOCKER}
+    - VIRUSMAILS_DELETE_DELAY=${VIRUSMAILS_DELETE_DELAY}
+    - ENABLE_POSTFIX_VIRTUAL_TRANSPORT=${ENABLE_POSTFIX_VIRTUAL_TRANSPORT}
+    - POSTFIX_DAGENT=${POSTFIX_DAGENT}
+    - ENABLE_SPAMASSASSIN=${ENABLE_SPAMASSASSIN}
+    - SA_TAG=${SA_TAG}
+    - SA_TAG2=${SA_TAG2}
+    - SA_KILL=${SA_KILL}
+    - SA_SPAM_SUBJECT=${SA_SPAM_SUBJECT}
+    - ENABLE_FETCHMAIL=${ENABLE_FETCHMAIL}
+    - FETCHMAIL_POLL=${FETCHMAIL_POLL}
+    - ENABLE_LDAP=${ENABLE_LDAP}
+    - LDAP_START_TLS=${LDAP_START_TLS}
+    - LDAP_SERVER_HOST=${LDAP_SERVER_HOST}
+    - LDAP_SEARCH_BASE=${LDAP_SEARCH_BASE}
+    - LDAP_BIND_DN=${LDAP_BIND_DN}
+    - LDAP_BIND_PW=${LDAP_BIND_PW}
+    - LDAP_QUERY_FILTER_USER=${LDAP_QUERY_FILTER_USER}
+    - LDAP_QUERY_FILTER_GROUP=${LDAP_QUERY_FILTER_GROUP}
+    - LDAP_QUERY_FILTER_ALIAS=${LDAP_QUERY_FILTER_ALIAS}
+    - DOVECOT_TLS=${DOVECOT_TLS}
+    - DOVECOT_USER_FILTER=${DOVECOT_USER_FILTER}
+    - DOVECOT_PASS_FILTER=${DOVECOT_PASS_FILTER}
+    - ENABLE_POSTGREY=${ENABLE_POSTGREY}
+    - POSTGREY_DELAY=${POSTGREY_DELAY}
+    - POSTGREY_MAX_AGE=${POSTGREY_MAX_AGE}
+    - POSTGREY_TEXT=${POSTGREY_TEXT}
+    - ENABLE_SASLAUTHD=${ENABLE_SASLAUTHD}
+    - SASLAUTHD_MECHANISMS=${SASLAUTHD_MECHANISMS}
+    - SASLAUTHD_MECH_OPTIONS=${SASLAUTHD_MECH_OPTIONS}
+    - SASLAUTHD_LDAP_SERVER=${SASLAUTHD_LDAP_SERVER}
+    - SASLAUTHD_LDAP_SSL=${SASLAUTHD_LDAP_SSL}
+    - SASLAUTHD_LDAP_BIND_DN=${SASLAUTHD_LDAP_BIND_DN}
+    - SASLAUTHD_LDAP_PASSWORD=${SASLAUTHD_LDAP_PASSWORD}
+    - SASLAUTHD_LDAP_SEARCH_BASE=${SASLAUTHD_LDAP_SEARCH_BASE}
+    - SASLAUTHD_LDAP_FILTER=${SASLAUTHD_LDAP_FILTER}
+    - SASL_PASSWD=${SASL_PASSWD}
     cap_add:
     - NET_ADMIN
     - SYS_PTRACE
     restart: always
-
 volumes:
   maildata:
     driver: local
   mailstate:
     driver: local
+