fix: Reintroduce Dockerfile #29

Job	Run time
bdk_test	1m 23s
check_stable	51s
build (x86_64-unknown-linux-gnu, ubuntu-latest)	1m 35s
build (armv7-unknown-linux-gnueabihf, ubuntu-latest)	5m 20s
build (x86_64-apple-darwin, macos-12)	2m 40s
docker_tests (happy_path)	2m 33s
build (aarch64-apple-darwin, macos-latest)	1m 32s
rpc_tests	3m 45s
docker_tests (happy_path_restart_bob_after_xmr_locked)	2m 44s
sqlx_test	34s
build (x86_64-pc-windows-msvc, windows-latest)	4m 27s
docker_tests (happy_path_restart_bob_before_xmr_locked)	2m 33s
docker_tests (happy_path_restart_alice_after_xmr_locked)	2m 35s
static_analysis	52s
docker_tests (alice_and_bob_refund_using_cancel_and_refund_command)	2m 38s
test (ubuntu-latest)	11m 39s
docker_tests (alice_and_bob_refund_using_cancel_then_refund_command)	2m 30s
test (macos-latest)	9m 49s
docker_tests (alice_and_bob_refund_using_cancel_and_refund_command_timelock_not_expired)	2m 13s
docker_tests (alice_manually_punishes_after_bob_dead_and_bob_cancels)	2m 37s
docker_tests (punish)	2m 53s
docker_tests (alice_punishes_after_restart_bob_dead)	2m 47s
docker_tests (alice_manually_punishes_after_bob_dead)	2m 58s
docker_tests (alice_refunds_after_restart_bob_refunded)	2m 17s
docker_tests (ensure_same_swap_id)	2m 5s
docker_tests (concurrent_bobs_before_xmr_lock_proof_sent)	2m 44s
docker_tests (concurrent_bobs_after_xmr_lock_proof_sent)	3m 7s
docker_tests (alice_manually_redeems_after_enc_sig_learned)	2m 25s
docker_tests (happy_path_bob_offline_while_alice_redeems_btc)	5m 26s
	1h 31m 32s

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