[IMP] Odoo 12.0-13.0: add support for docker secret

In order to avoid postgresql password in an environment variable, a
PASSWORD_FILE environment may be used instead.

This allow the usage of secrets in docker-compose [0]

[0](https://github.com/compose-spec/compose-spec/blob/master/spec.md#secrets)

Author: d-fence

12.0/entrypoint.sh

@@ -2,6 +2,10 @@
 
 set -e
 
+if [ -v PASSWORD_FILE ]; then
+    PASSWORD="$(< $PASSWORD_FILE)"
+fi
+
 # set the postgres database host, port, user and password according to the environment
 # and pass them as arguments to the odoo process if not present in the config file
 : ${HOST:=${DB_PORT_5432_TCP_ADDR:='db'}}

13.0/entrypoint.sh

@@ -2,6 +2,10 @@
 
 set -e
 
+if [ -v PASSWORD_FILE ]; then
+    PASSWORD="$(< $PASSWORD_FILE)"
+fi
+
 # set the postgres database host, port, user and password according to the environment
 # and pass them as arguments to the odoo process if not present in the config file
 : ${HOST:=${DB_PORT_5432_TCP_ADDR:='db'}}

14.0/entrypoint.sh

@@ -2,6 +2,10 @@
 
 set -e
 
+if [ -v PASSWORD_FILE ]; then
+    PASSWORD="$(< $PASSWORD_FILE)"
+fi
+
 # set the postgres database host, port, user and password according to the environment
 # and pass them as arguments to the odoo process if not present in the config file
 : ${HOST:=${DB_PORT_5432_TCP_ADDR:='db'}}