feat: add initial supervisor setup

docker/docker-entrypoint.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+# Setup environment variables
+
+printenv | grep API_GATEWAY_ | sed 's/API_GATEWAY_//g' > /opt/server/packages/api-gateway/.env
+
+# Run supervisor
+
+supervisord -c /etc/supervisord.conf
+
+exec "$@"

docker/supervisord.conf

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+[supervisord]
+nodaemon=true
+logfile=/tmp/supervisord.log
+
+[program:api-gateway]
+directory=/opt/server
+command=yarn start:api-gateway
+autostart=true
+autorestart=true
+stdout_logfile=/var/lib/server/logs/api-gateway.log
+stderr_logfile=/var/lib/server/logs/api-gateway.err