Add support for #4 - Make Postgres port configurable at run time

Dockerfile

@@ -62,6 +62,8 @@ ENV SSMTP_FROMLINE_OVERRIDE YES
 #ENV SSMTP_AUTH_METHOD
 
 ENV POSTGRES_HOST postgres
+ENV POSTGRES_PORT 5432
+ENV DEFAULT_DB lsmb
 
 COPY start.sh /usr/bin/start.sh
 COPY update_ssmtp.sh /usr/bin/update_ssmtp.sh

README.md

@@ -62,6 +62,14 @@ This environment variable is used to specify the hostname of the Postgres server
 
 If you set this to another hostname, LedgerSMB will attempt to connect to that hostname instead.
 
+## `POSTGRES_PORT` = 5432
+
+Port to connect to Postgres on. Use to connect to a Postgres server running on an alternate port.
+
+## `DEFAULT_DB` = lsmb
+
+Set this if you want to automatically log in to a particular LSMB database.
+
 ### `SSMTP_ROOT` `SSMTP_MAILHUB` `SSMTP_HOSTNAME` `SSMTP_USE_STARTTLS` `SSMTP_AUTH_USER` `SSMTP_AUTH_PASS` `SSMTP_METHOD` `SSMTP_FROMLINE_OVERRIDE`
 
 These variables are used to set outgoing SMTP defaults. To set the outgoing email address, set SSMTP_ROOT, and SSMTP_HOSTNAME at a minimum -- SSMTP_MAILHUB defaults to the default docker0 interface, so if your host is already configured to relay mail, this should relay successfully with only those two set.

start.sh

@@ -8,6 +8,8 @@ if [[ ! -f ledgersmb.conf ]]; then
   sed -i \
     -e "s/\(cache_templates = \).*\$/cache_templates = 1/g" \
     -e "s/\(host = \).*\$/\1$POSTGRES_HOST/g" \
+    -e "s/\(port = \).*\$/\1$POSTGRES_PORT/g" \
+    -e "s/\(default_db = \).*\$/\1$DEFAULT_DB/g" \
     -e "s%\(sendmail   = \).*%\1/usr/bin/ssmtp%g" \
     /srv/ledgersmb/ledgersmb.conf
 fi