doc: fix issues and remove heroku section

README.md

@@ -3,7 +3,7 @@
 Bridge between Twitter and Mastodon (or any OStatus-compliant instance). Powered by [go-ostatus](/~https://github.com/emersion/go-ostatus).
 
 For the moment, this is a read-only bridge: you'll be able to see Twitter
-activity from Mastodon (try to follow to follow _twitter_username@rootURL_), but you won't be able to interact with it.
+activity from Mastodon (try to follow _twitter_username@rootURL_), but you won't be able to interact with it.
 
 ## Usage
 
@@ -17,43 +17,30 @@ emuarius
 ```
 
 ### Docker
+
 ```shell
 docker build -t emuarius .
-docker run -e "EMUARIUS_TWITTER_CONSUMER_KEY=xxx" \
+docker run -p 4004:4004 \
 -e "EMUARIUS_TWITTER_CONSUMER_SECRET=xxx" \
 -e "EMUARIUS_TWITTER_ACCESS_TOKEN=xxx" \
--e "EMUARIUS_TWITTER_ACCESS_TOKEN_SECRET=xxx" emuarius
-```
-
-### Heroku
-You need the heroku [cli tool](https://devcenter.heroku.com/articles/heroku-cli).
-```shell
-heroku container:login
-heroku create
-heroku container:push web
-heroku container:release web
-heroku ps:scale web=1
-heroku open # The opened url is the EMUARIUS_ROOT_URL
+-e "EMUARIUS_TWITTER_ACCESS_TOKEN_SECRET=xxx" \
+-e "EMUARIUS_TWITTER_CONSUMER_KEY=xxx"  emuarius
 ```
-Configure environment variables with Twitter app credentials inside the [dashboard](https://dashboard.heroku.com/). You dont need to set _EMUARIUS_ADDRESS_ or _EMUARIUS_ROOT_URL_
-
-
 
 ## Configuration
 
 You can configure emuarius with a toml configuration file or environment variables. Environment variables will take precedence over toml values.
 
-
-| toml                      | env                                 | default               |
-| ------------------------- | ----------------------------------- | --------------------- |
-| address                   | EMUARIUS_ADDRESS                     | :4004                 |
-| rootURL                   | EMUARIUS_ROOT_URL                    | http://localhost:4004 |
-| databasePath              | EMUARIUS_DATABASE_PATH               | ./emuarius.db         |
-| twitter.consumerKey       | EMUARIUS_TWITTER_CONSUMER_KEY        |                       |
-| twitter.consumerSecret    | EMUARIUS_TWITTER_CONSUMER_SECRET     |                       |
-| twitter.accessToken       | EMUARIUS_TWITTER_ACCESS_TOKEN        |                       |
-| twitter.accessTokenSecret | EMUARIUS_TWITTER_ACCESS_TOKEN_SECRET |                       |
-
+| toml                      | env                                  | default                |
+| ------------------------- | ------------------------------------ | ---------------------- |
+|                           | PORT                                 |                        |
+| address                   | EMUARIUS_ADDRESS                     | :4004 or 0.0.0.0:$PORT |
+| rootURL                   | EMUARIUS_ROOT_URL                    | http://localhost:4004  |
+| databasePath              | EMUARIUS_DATABASE_PATH               | ./emuarius.db          |
+| twitter.consumerKey       | EMUARIUS_TWITTER_CONSUMER_KEY        |                        |
+| twitter.consumerSecret    | EMUARIUS_TWITTER_CONSUMER_SECRET     |                        |
+| twitter.accessToken       | EMUARIUS_TWITTER_ACCESS_TOKEN        |                        |
+| twitter.accessTokenSecret | EMUARIUS_TWITTER_ACCESS_TOKEN_SECRET |                        |
 
 ## License