Improve docker install docs (#315)

* Improve docker install docs

* pgautoupgrade

assets/docker-compose.yml

@@ -0,0 +1,88 @@
+x-logging: &default-logging
+  driver: "json-file"
+  options:
+    max-size: "50m"
+    max-file: "4"
+
+services:
+  proxy:
+    image: nginx:1-alpine
+    ports:
+      # Listen for outside connections on port 10633. You can freely change the left-side
+      # number to a different port, eg using port 80 if you don't need a reverse proxy.
+      - "10633:8536"
+    volumes:
+      - ./nginx_internal.conf:/etc/nginx/nginx.conf:ro,Z
+      - ./proxy_params:/etc/nginx/proxy_params:ro,Z
+    restart: always
+    logging: *default-logging
+    depends_on:
+      - pictrs
+      - lemmy-ui
+
+  lemmy:
+    image: dessalines/lemmy:0.19.5
+    hostname: lemmy
+    restart: always
+    logging: *default-logging
+    environment:
+      - RUST_LOG="warn"
+    volumes:
+      - ./lemmy.hjson:/config/config.hjson:Z
+    depends_on:
+      - postgres
+      - pictrs
+
+  lemmy-ui:
+    image: dessalines/lemmy-ui:0.19.5
+    environment:
+      - LEMMY_UI_LEMMY_INTERNAL_HOST=lemmy:8536
+      - LEMMY_UI_LEMMY_EXTERNAL_HOST=lemmy.ml
+      - LEMMY_UI_HTTPS=true
+    volumes:
+      - ./volumes/lemmy-ui/extra_themes:/app/extra_themes
+    depends_on:
+      - lemmy
+    restart: always
+    logging: *default-logging
+
+  pictrs:
+    image: asonix/pictrs:0.5.16
+    # this needs to match the pictrs url in lemmy.hjson
+    hostname: pictrs
+    # we can set options to pictrs like this, here we set max. image size and forced format for conversion
+    # entrypoint: /sbin/tini -- /usr/local/bin/pict-rs -p /mnt -m 4 --image-format webp
+    environment:
+      - PICTRS_OPENTELEMETRY_URL=http://otel:4137
+      - PICTRS__SERVER__API_KEY={{ postgres_password }}
+      - RUST_BACKTRACE=full
+      - PICTRS__MEDIA__VIDEO__VIDEO_CODEC=vp9
+      - PICTRS__MEDIA__ANIMATION__MAX_WIDTH=256
+      - PICTRS__MEDIA__ANIMATION__MAX_HEIGHT=256
+      - PICTRS__MEDIA__ANIMATION__MAX_FRAME_COUNT=400
+    user: 991:991
+    volumes:
+      - ./volumes/pictrs:/mnt:Z
+    restart: always
+    logging: *default-logging
+
+  postgres:
+    image: pgautoupgrade/pgautoupgrade:16-alpine
+    hostname: postgres
+    environment:
+      - POSTGRES_USER=lemmy
+      - POSTGRES_PASSWORD={{ postgres_password }}
+      - POSTGRES_DB=lemmy
+    shm_size: 1g
+    volumes:
+      - ./volumes/postgres:/var/lib/postgresql/data:Z
+      - ./customPostgresql.conf:/etc/postgresql.conf
+    restart: always
+    logging: *default-logging
+
+  postfix:
+    image: mwader/postfix-relay
+    environment:
+      - POSTFIX_myhostname={{ domain }}
+    restart: "always"
+    logging: *default-logging

src/administration/administration.md

@@ -2,7 +2,7 @@
 
 Information for Lemmy instance admins, and those who want to run a server.
 
-If you have any problems in the installation, you can ask for help in [!lemmy_support](https://lemmy.ml/c/lemmy_support). Do not use Github for support.
+If you have any problems in the installation, you can ask for help in [!lemmy_support](https://lemmy.ml/c/lemmy_support) or [Matrix](https://matrix.to/#/#lemmy-support-general:discuss.online). Do not open Github issues for support.
 
 ## Install
 

src/administration/install_docker.md

@@ -1,30 +1,25 @@
 # Docker Installation
 
-Make sure you have both docker and docker-compose(>=`2.0`) installed. On Ubuntu, just run `apt install docker-compose-v2 docker.io`. On Debian, you need to install Docker [using their official installation instructions and custom `apt` repo](https://docs.docker.com/engine/install/debian/). Next,
+Make sure you have both docker and docker-compose(>=`2.0`) installed. On Ubuntu, just run `apt install docker-compose-v2 docker.io`. On Debian, you need to install Docker [using their official installation instructions and custom `apt` repo](https://docs.docker.com/engine/install/debian/).
+
+Create a folder for the lemmy files. the location doesnt matter. You can put this anywhere you want, for example under `/srv/`:
 
 ```bash
-# Create a folder for the lemmy files. the location doesnt matter, you can put this anywhere you want
 mkdir lemmy
 cd lemmy
 ```
 
-## Download default config files
+Then download default config files:
-
-These files contain `{{ }}` braces for variables, such as passwords and your domain.
-
-Edit them before starting up lemmy for the first time.
-
-The images will likely be: [dessalines/lemmy:VERSION](https://hub.docker.com/r/dessalines/lemmy) and [dessalines/lemmy-ui:VERSION](https://hub.docker.com/r/dessalines/lemmy-ui)
-
-[Tracking Issue](https://github.com/LemmyNet/lemmy/issues/3996): For now, using `latest` is not advisable as changes can break your instance. Make sure you are using a specific version number. This is temporary and will be fixed.
 
 ```bash
-wget https://raw.githubusercontent.com/LemmyNet/lemmy-ansible/main/templates/docker-compose.yml
+wget https://raw.githubusercontent.com/LemmyNet/lemmy-docs/main/assets/docker-compose.yml
 wget https://raw.githubusercontent.com/LemmyNet/lemmy-ansible/main/examples/config.hjson -O lemmy.hjson
 wget https://raw.githubusercontent.com/LemmyNet/lemmy-ansible/main/templates/nginx_internal.conf
 wget https://raw.githubusercontent.com/LemmyNet/lemmy-ansible/main/files/proxy_params
 ```
 
+Edit `docker-compose.yml` and `lemmy.hjson` to replace all occurrences of `{{ domain }}` with your actual Lemmy domain, `{{ postgres_password }}` with a random password and `{{lemmy_port}}` with `10633`.
+
 If you'd like further customization, have a look at the [config file](configuration.md) named `lemmy.hjson`, and adjust it accordingly.
 
 ## Database tweaks
@@ -72,10 +67,9 @@ For federation to work, it is important that you do not change any headers that
 
 # Updating
 
-To update to the newest version, you can manually change the version in `docker-compose.yml`. Alternatively, fetch the latest version from our [lemmy-ansible](https://github.com/LemmyNet/lemmy-ansible) repo:
+To update to the newest version, it is usually enough to change the version numbers in `docker-compose.yml`, eg `dessalines/lemmy:0.19.4` to `dessalines/lemmy:0.19.5`. If additional steps are required, these are explained in the respective release announcement. After changing the versions, run these commands:
 
 ```bash
-wget https://raw.githubusercontent.com/LemmyNet/lemmy-ansible/main/templates/docker-compose.yml
+docker compose pull
-# Then replace the {{ }} vars again
 docker compose up -d
 ```