build: use specific tag for nightly deployments

This patch is required to fix the nightly deployment:

 * We need to use the exact docker image tag what we built earlier
 * Migration should be full instead of snapshot (snapshot couldn't update existing, but older dbs)

Change-Id: Id2a2070638072a7b0021326326b0d53533817168

Earthfile

@@ -86,6 +86,7 @@ deploy-remote:
     ENV NOMAD_ADDR=$nomad
     ENV IP=$ip
     ENV IMAGE=$IMAGE
+    ENV TAG=$TAG
     RUN --push ./deploy-nightly.sh
 
 deploy-local:

scripts/deploy/deploy-nightly.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 set -ex
 storj-up init nomad --name=core --ip=$IP minimal,gc
-storj-up image satellite-api,storagenode,gc $IMAGE
+storj-up image satellite-api,storagenode,gc $IMAGE:$TAG
 storj-up persist storagenode,satellite-api,gc
-storj-up env set satellite-api STORJ_DATABASE_OPTIONS_MIGRATION_UNSAFE=snapshot,testdata
+storj-up env set satellite-api STORJ_DATABASE_OPTIONS_MIGRATION_UNSAFE=full,testdata
 nomad run storj.hcl