diff --git a/README.md b/README.md
index 3663e91..7298eb8 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,13 @@
 # profile-api
 Generate easy Profile pictures and more!
+
+## Running locally
+
+Install dependencies from `requirements.txt` and start the server with:
+
+```bash
+python main.py
+```
+
+The API listens on `0.0.0.0:5000`, making it reachable from other machines on the
+network.
diff --git a/main.py b/main.py
index ef20d2a..03bdf08 100644
--- a/main.py
+++ b/main.py
@@ -26,4 +26,5 @@ def create_pic():
 
 
 if __name__ == "__main__":
-    app.run()
+    # Bind to all interfaces so the API is reachable outside the container/host.
+    app.run(host="0.0.0.0")