Add smoke-test for the node code at CI #12
Description
It would be great to have a set of tests that would test our node binary executable at CI.
Things to test:
- node doesn't crash immediately after startup with an empty state
- node doesn't crash immediately after startup with a preexisting state (state used from some previous version, unpacked from a static CI asset)
- node can accept an extrinsic via the RPC endpoint without crashing
- node can (after accepting the tx) process it and produce a block that includes the said transaction
... more? If you have an idea for a quick and simple smoke-check - please let me know.