Add nginx behind traefik in docker-compose + image updates

- support/docker/production/docker-compose.yml: addition of a nginx
image reusing support/nginx/peertube nginx conf to improve performance,
and lessen setup differences between the docker-compose install and the
typical production install.
- support/docker/production/docker-compose.yml: postgres 10 -> postgres
12, redis 4 -> redis 5. Postgres major updates implies manual upgrade.
- support/nginx/peertube: HTTP -> HTTPS redirection is now commented
by default, to allow its reuse in support/docker/production/docker-compose.yml.

1 files changed, 2 insertions, 1 deletions

diff --git a/support/doc/production.md b/support/doc/production.md
index b8877ca8b..0ee275e9e 100644
--- a/support/doc/production.md
+++ b/support/doc/production.md
@@ -100,7 +100,8 @@ Then set the domain for the webserver configuration file.
 Replace `[peertube-domain]` with the domain for the peertube server.
 
 ```
-$ sudo sed -i 's/peertube.example.com/[peertube-domain]/g' /etc/nginx/sites-available/peertube
+$ sudo sed -i 's/${WEBSERVER_HOST}/[peertube-domain]/g' /etc/nginx/sites-available/peertube
+$ sudo sed -i 's/${PEERTUBE_HOST}/localhost:9000/g' /etc/nginx/sites-available/peertube
 ```
 
 Then modify the webserver configuration file. Please pay attention to the `alias` keys of the static locations.