Add method of mixing in secrets to docker-compose.yml

bin/mixin-secrets

@@ -0,0 +1,21 @@
+#!/bin/bash
+#
+# Generates a fancy docker-compose.yml based on the template by
+# mixing in production secrets.
+#
+# Olivia Mackintosh <livvy@base.nu>
+
+THISDIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
+TEMPLATE=${THISDIR}/../docker-compose.yml.template
+
+if [ -z "$DATABASE_PASSWORD" ]; then
+    echo "Error: Please set \$DATABASE_PASSWORD"
+    exit 1
+fi
+
+if [ -z "$SMTP_PASSWORD" ]; then
+    echo "Error: Please set \$SMTP_PASSWORD"
+    exit 1
+fi
+
+envsubst < $TEMPLATE | cat -