Add readme for startup

README.md

@@ -26,4 +26,31 @@ They're orchestrated in the following way:
 
 <div align="center">
 <img src="./docs/static/statusphere-architecture-white.png" height="300" alt="Statusphere logo">
-</div>
+</div>
+
+
+## Usage
+
+### Scraper
+
+The scrapers need to be started with the following environment variables:
+
+```bash
+STATUSPHERE_POSTGRES_HOST=...
+STATUSPHERE_POSTGRES_PORT=...
+STATUSPHERE_POSTGRES_USER=...
+STATUSPHERE_POSTGRES_PASSWORD=...
+STATUSPHERE_POSTGRES_DATABASE=...
+```
+
+### API
+
+The api needs to be started with the following environment variables:
+
+```bash
+STATUSPHERE_POSTGRES_HOST=...
+STATUSPHERE_POSTGRES_PORT=...
+STATUSPHERE_POSTGRES_USER=...
+STATUSPHERE_POSTGRES_PASSWORD=...
+STATUSPHERE_POSTGRES_DATABASE=...
+```