feat: add support for specifying multiple networks on a given app

Closes #5314

tests/unit/network.bats

@@ -156,11 +156,21 @@ teardown() {
   echo "status: $status"
   assert_success
 
+  run /bin/bash -c "dokku network:create create-network-2"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
   run /bin/bash -c "dokku network:create deploy-network"
   echo "output: $output"
   echo "status: $status"
   assert_success
 
+  run /bin/bash -c "dokku network:create deploy-network-2"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
   run /bin/bash -c "dokku network:create initial-network"
   echo "output: $output"
   echo "status: $status"
@@ -208,6 +218,22 @@ teardown() {
   assert_success
   assert_http_success "${TEST_APP}.dokku.me"
 
+  run /bin/bash -c "dokku network:set $TEST_APP attach-post-create create-network create-network-2"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
+  run /bin/bash -c "dokku network:set $TEST_APP attach-post-deploy deploy-network deploy-network-2"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
+  run /bin/bash -c "dokku ps:rebuild $TEST_APP"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+  assert_http_success "${TEST_APP}.dokku.me"
+
   run /bin/bash -c "dokku --force network:destroy create-network"
   echo "output: $output"
   echo "status: $status"
@@ -224,7 +250,15 @@ teardown() {
   assert_success
 
   # necessary in order to remove networks in use by "dead" containers
-  docker container prune --force
+  run /bin/bash -c "docker container prune --force"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
+  run /bin/bash -c "docker container ls -a"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
 
   run /bin/bash -c "dokku --force network:destroy create-network"
   echo "output: $output"