diff --git a/README.md b/README.md
index 1e83ffa80..d40bf4464 100644
--- a/README.md
+++ b/README.md
@@ -30,6 +30,57 @@ You can build a docker container for the whole thingy by running (for example):
 docker build -t superseriousbusiness/masto-fe-standalone:0.1.0 .
 ```
 
+## Testing Locally
+
+You can fairly easily test builds of Masto-FE locally by using Docker and the GoToSocial testrig.
+
+### Build GoToSocial + launch the GtS testrig
+
+First get the GoToSocial repository cloned somewhere:
+
+```bash
+mkdir -p ~/go/src/codeberg.org/superseriousbusiness && \
+cd ~/go/src/codeberg.org/superseriousbusiness && \
+git clone git@codeberg.org:superseriousbusiness/gotosocial && \
+cd ~/go/src/codeberg.org/superseriousbusiness/gotosocial
+```
+
+In the GtS repo directory, build GoToSocial with `DEBUG=1` to enable the testrig:
+
+```bash
+DEBUG=1 ./scripts/build.sh
+```
+
+In the GtS repo directory, launch the GoToSocial testrig using the newly built binary, which will bind to port 8080 on localhost:
+
+```bash
+DEBUG=1 GTS_LOG_LEVEL=info ./gotosocial testrig start
+```
+
+Leave the testrig running.
+
+### Build Masto-FE + run it locally
+
+Now in a *separate* terminal window, get back to the Masto-FE directory, and do a Docker build (this might take a bit of time):
+
+```bash
+docker build -t superseriousbusiness/masto-fe-standalone:latest .
+```
+
+Deploy Masto-FE locally on port 3000:
+
+```bash
+docker run -it -p 3000:80 superseriousbusiness/masto-fe-standalone:latest
+```
+
+Open your browser and go to http://localhost:3000.
+
+In the front page, enter `http://localhost:8080` as your domain/instance. **The `http://` part is important, as without it Masto-FE will expect `https`!**
+
+Log in as email `zork@example.org`, password `password`, or `admin@example.org`, password `password`. You can now try posting stuff, viewing timelines, etc.
+
+If you want to reset the testrig state, just stop it and launch it again. All database + storage state will be cleared when it stops, and repopulated when it launches. You will then need to log out of Masto-FE (🦥 flavour) and log back in again to reauthenticate.
+
 ## Deploying
 
 ### Not Docker