Improve deploy instructions

README.md

@@ -31,5 +31,25 @@ You should now have icons in your applications menu for the Quest Editor and Lau
 
 See [*Releasing your app*](https://docs.snapcraft.io/releasing-your-app/6795).
 
-* `snapcraft login`
-* `snapcraft push --release=stable solarus_*.snap`
+1. Log into Snapcraft if you haven't already done so.
+```
+snapcraft login
+```
+
+2. Push your build to the `edge` channel. Take note of the revision number returned by this command.
+```
+snapcraft push --release=edge solarus_*.snap
+```
+
+3. Test the revision on your own computer by switching to the `edge` channel. Launch the app and make sure all the functions work.
+```
+snap switch --channel=edge solarus
+snap refresh solarus
+```
+
+4. Repeat steps 2 and 3 as necessary until you're ready for a stable release.
+
+5. Once you're confident to push it live, just bump the revision into the `stable` channel.
+```
+snapcraft release solarus <revision> stable
+```