Try MongoDB 4.0.10 deb with libcurl3-gnutls

snapcraft.yaml

@@ -65,7 +65,7 @@ apps:
 
 parts:
     mongodb:
-        source: https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-4.0.10.tgz
+        source: https://repo.mongodb.org/apt/ubuntu/dists/xenial/mongodb-org/4.0/multiverse/binary-amd64/mongodb-org-server_4.0.10_amd64.deb
         plugin: dump
         stage-packages: [libssl1.0.0]
         filesets:
@@ -92,6 +92,7 @@ parts:
         #    - gcc++-8
         #    - capnproto
             - curl
+            - libcurl3-gnutls
         #    - execstack
         #    - nodejs
         #    - npm