remove of some inconsistency in the docker compose examples (#63)

Co-authored-by: Sven Förster <acc_gitlab@svfo.de>

examples/env.example

@@ -1,21 +1,39 @@
+# databse host address
+DB_HOST=
+
+# the database type mysql or pgsql
+DB_TYPE=
+
+# the datbase port (mysql 3306) (pqsql 5432)
+DB_PORT=
+
+# the databse name
+DB_NAME=
+
+# the databse name
+DB_USER=
+
 # mysql root password. Irrelevant if you are using postgres
 ROOT_DB_PASSWORD=
 
-# database password for the dmarc user
-DMARC_DB_PASSWORD=
+# database password for the database user
+DB_PASSWORD=
 
 # the email address receiving the DMARC reports
-DMARC_EMAIL=
+IMAP_USER=
 
 # the password for the email address receiving the DMARC reports
-DMARC_PASSWORD=
+IMAP_PASSWORD=
 
 # the server the email address is hosted on
 IMAP_SERVER=
 
-# optional: default is 993
+# optional: default is 993 ( or 143)
 IMAP_PORT=
 
+# optional: default is "Inbox"
+IMAP_READ_FOLDER
+
 # optional: default is "processed"
 IMAP_MOVE_FOLDER=