update README with podman instructions

README.md

@@ -20,7 +20,9 @@ Read the latest updates on Mastodon: [@fediversespace](https://mastodon.social/@
 
 ## Requirements
 
-Though dockerized, backend development is easiest if you have the following installed.
+Note: examples here use `podman`. In most cases you should be able to replace `podman` with `docker`, `podman-compose` with `docker-compose`, and so on.
+
+Though containerized, backend development is easiest if you have the following installed.
 
 - For the scraper + API:
   - Elixir
@@ -36,9 +38,8 @@ Though dockerized, backend development is easiest if you have the following inst
 ### Backend
 
 - `cp example.env .env` and modify environment variables as required
-- `docker-compose build`
+- `podman-compose build`
-- `docker-compose up -d phoenix`
+- `podman-compose -f compose.backend-services.yml -f compose.phoenix.yml`
-  - if you don't specify `phoenix`, it'll also start `gephi` which should only be run as a regular one-off job
 - Create the elasticsearch index:
   - `iex -S mix app.start`
   - `Elasticsearch.Index.hot_swap(Backend.Elasticsearch.Cluster, :instances)`

docker-compose.yml

@@ -1,65 +0,0 @@
-version: "3"
-services:
-  db:
-    image: postgres
-    environment:
-      - DATABASE_URL
-    ports:
-      - "5432:5432"
-    volumes:
-      - pgdata:/var/lib/postgresql/data
-    networks:
-      - database_network
-  elasticsearch:
-    image: elasticsearch:6.8.1
-    ports:
-      - "9200:9200"
-    volumes:
-      - esdata:/usr/share/elasticsearch/data
-    networks:
-      - phoenix_network
-      - es_network
-  # Kibana is just for development, really
-  kibana:
-    image: kibana:6.8.1
-    networks:
-      - es_network
-    ports:
-      - "5601:5601"
-  # This is for running the occasional graph layout task. It's in docker-compose.yml so that it's built at the same time
-  # as everything else, but it should be run regularly with a cron job or similar.
-  gephi:
-    environment:
-      - DATABASE_URL
-    build: ./gephi
-    volumes:
-      - gradle-cache:/code/.gradle
-    depends_on:
-      - db
-    networks:
-      - database_network
-  phoenix:
-    build: ./backend
-    networks:
-      - database_network
-      - phoenix_network
-    depends_on:
-      - db
-    ports:
-      - "${PORT}:${PORT}"
-    environment:
-      - DATABASE_URL
-      - SECRET_KEY_BASE
-      - PORT
-      - BACKEND_HOSTNAME
-volumes:
-  pgdata:
-  esdata:
-  gradle-cache:
-networks:
-  database_network:
-    driver: bridge
-  phoenix_network:
-    driver: bridge
-  es_network:
-    driver: bridge