Added a download archive to replace example files in nomad image.

docker/mpes/example/downloads.archive.yaml

+data:
+  m_def: nomad.datamodel.metainfo.downloads.Downloads
+  mainfiles:
+    - TiTe2/TiTe2_0deg.nxs
+    - TiTe2/TiTe2_60deg.nxs
+    - mpes.archive.json
+  downloads:
+    - url: https://zenodo.org/record/7035754/files/MoTe2.h5?download=1
+      output: MoTe2.h5
+    - url: https://zenodo.org/record/5541490/files/TiTe2_0deg.nxs?download=1
+      output: TiTe2/TiTe2_0deg.nxs
+    - url: https://zenodo.org/record/5541490/files/TiTe2_60deg.nxs?download=1
+      output: TiTe2/TiTe2_60deg.nxs
\ No newline at end of file