Added documentation for the env vars

ref #123

README.md

@@ -55,6 +55,30 @@ yarn docs
 
 * will be automatically recommended via ./vscode/extensions.json
 
+## ENV Vars
+> You can provide them via .env file or docker env vars.
+> You can use the `test:ci:generate_env` package script to generate a example env.
+
+Name | Type | Default | Description
+- | - | - | -
+APP_PORT | Number | 4010 | The port the backend server listens on. Is optional.
+DB_TYPE | String | N/A | The type of the db u want to use. It has to be supported by typeorm. Possible: `sqlite`, `mysql`, `postgresql`
+DB_HOST | String | N/A | The db's host's ip-address/fqdn or file path for sqlite
+DB_PORT | String | N/A | The db's port
+DB_USER | String | N/A | The user for accessing the db
+DB_PASSWORD | String | N/A | The user's password for accessing the db
+DB_NAME | String | N/A | The db's name
+NODE_ENV | String | dev | The apps env - influences debug info.
+POSTALCODE_COUNTRYCODE | String/CountryCode | N/A | The countrycode used to validate address's postal codes
+PHONE_COUNTRYCODE | String/CountryCode | null (international) | The countrycode used to validate phone numers
+SEED_TEST_DATA | Boolean | False | If you want the app to seed some example data set this to true
+MAIL_SERVER | String | N/A | The smtp server's ip-address/fqdn
+MAIL_PORT | String | N/A | The smtp server's port
+MAIL_USER | String | N/A | The username for sending mails
+MAIL_PASSWORD | String | N/A | The user's password for sending mails
+MAIL_FROM | String | N/A | The from-address for sending mails
+
+
 ## Staging
 ### Branches & Tags
 * vX.Y.Z: Release tags created from the main branch