Add local dev script.

README.md

@@ -67,3 +67,20 @@ $ gmg --conf_file /app/mediagoblin_local.ini makeadmin username
 ```
 
 Where `username` corresponds to the user you added above.
+
+
+## Local development
+
+To build the image locally, run:
+
+```console
+scripts/build
+```
+
+And then to run the image:
+
+```console
+scripts/dev
+```
+
+Connect to http://localhost:8080 to view the running instance in your browser.

scripts/dev

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+set -e
+
+USER_PODMAN_SOCKET_PATH=/run/user/$UID/podman/podman.sock
+
+if [ -e "$USER_PODMAN_SOCKET_PATH" ]; then
+    export DOCKER_HOST="unix://$USER_PODMAN_SOCKET_PATH"
+fi
+
+docker-compose --file dev-compose.yml up