Feat/support postgres password file (#11)

* feat: add support for postgres password file (docker secret)

* docs: update docs

* fix: read POSTGRES_PASSWORD from file first

* fix: fix env var name

* change: update support for POSTGRESQL_PASSWORD_FILE

README.md

@@ -40,6 +40,7 @@ Available environment variables
 	- POSTGRESQL\_CONNECTION\_URI
 	- POSTGRESQL\_USER
 	- POSTGRESQL\_PASSWORD
+	- POSTGRESQL\_PASSWORD\_FILE
 	- POSTGRESQL\_CONNECTION\_POOL\_SIZE
 	- POSTGRESQL\_HOST
 	- POSTGRESQL\_PORT
@@ -101,4 +102,4 @@ docker run \
 ## Database setup
 - Before you start this container, make sure to initialize your database.
 - You do not need to ensure that the Postgresql database has started before this container is started. During bootup, SuperTokens will wait for ~1 hour for a Postgresql instance to be available.
-- If `POSTGRESQL_USER`, `POSTGRESQL_PASSWORD` and `POSTGRESQL_CONNECTION_URI` are not provided, then SuperTokens will use an in memory database.
+- If `POSTGRESQL_USER`, `POSTGRESQL_PASSWORD`, `POSTGRESQL_PASSWORD_FILE` and `POSTGRESQL_CONNECTION_URI` are not provided, then SuperTokens will use an in memory database.

docker-entrypoint.sh

@@ -56,6 +56,12 @@ then
         echo "postgresql_user: $POSTGRESQL_USER" >> $CONFIG_FILE
     fi
 
+    if [ ! -z $POSTGRESQL_PASSWORD_FILE ]
+    then
+        POSTGRESQL_PASSWORD=$(cat "$POSTGRESQL_PASSWORD_FILE")
+        export POSTGRESQL_PASSWORD
+    fi
+
     # verify postgresql password is passed
     if [ ! -z $POSTGRESQL_PASSWORD ]
     then
@@ -292,4 +298,4 @@ if [ "$(id -u)" = "0" ] && [ "$1" = 'supertokens' ]; then
     exec gosu supertokens "$@"
 else
     exec "$@"
-fi
+fi