docs: update developer instructions

docs/developer/README.md

@@ -2,11 +2,19 @@
 
 ## Local development environment
 
-The build-requirements for Fedora (and other rpm-based distributions) are:
-- `gpgme-devel`
-
+To build most binaries defined in `cmd` and run tests you will need to install `gpgme-devel`.
+To generate manifests, you will need to install the `osbuild-depsolve-dnf` package.
 To build images, you will also need to install `osbuild` and its sub-packages.
 
+The full list of dependencies is:
+- `gpgme-devel`
+- `osbuild`
+- `osbuild-depsolve-dnf`
+- `osbuild-luks2`
+- `osbuild-lvm2`
+- `osbuild-ostree`
+- `osbuild-selinux`
+
 ## Topics
 
 - [Useful cmds](./cmds.md) for development and testing.