usage guide in readme

README.md

@@ -9,6 +9,27 @@ the posts/comments dump is read as a stream so handling bigger subreddits is les
 
 You can build the SQL script before making the comm/user though.
 
+## usage:
+install dependencies
+
+`yarn install`
+
+run the program
+
+`yarn run importer --posts example-submissions.json --comments example-comments.json -c example_archive  -u archive_bot -o example.sql`
+
+option 1: import your sql remotely
+
+`psql --username=lemmy --dbname=lemmy --port=[lemmy-port]  --host=[ip/host] --file=example.sql`
+
+option 2: import your sql on the server
+
+`psql --username=lemmy --dbname=lemmy --file=example.sql`
+
+option 3: import your sql to a docker container
+
+`<example.sql docker exec -i [container-id] psql --username=lemmy --dbname=lemmy -`
+
 ## TODO:
 - set URL embed titles/descriptions and url_content type and embed_video_url in posts