https://github.com/bonfire-networks/bonfire-app/issues/417

flavours/classic/config/deps.hex

@@ -31,6 +31,7 @@ ecto_psql_extras = "~> 0.7.4"
 
 # Uploads (depending on what service you use)
 ex_aws_s3 = "~> 2.3"
+ex_marcel = "~> 0.1.0"
 
 # Auth
 eqrcode = "~> 0.1.10"

mix.lock

@@ -115,6 +115,7 @@
   "ex_doc": {:git, "https://github.com/elixir-lang/ex_doc", "8de50613706c6ff452969465ed765557a7d080d2", []},
   "ex_json_schema": {:hex, :ex_json_schema, "0.10.1", "e03b746b6675a750c0bb1a5cc919f61353f7ab8450977e11ceede20e6180c560", [:mix], [{:decimal, "~> 2.0", [hex: :decimal, repo: "hexpm", optional: false]}], "hexpm", "66a64e60dadad89914d92f89c7e7906c57de75a8b79ac2480d0d53e1b8096fb0"},
   "ex_machina": {:hex, :ex_machina, "2.7.0", "b792cc3127fd0680fecdb6299235b4727a4944a09ff0fa904cc639272cd92dc7", [:mix], [{:ecto, "~> 2.2 or ~> 3.0", [hex: :ecto, repo: "hexpm", optional: true]}, {:ecto_sql, "~> 3.0", [hex: :ecto_sql, repo: "hexpm", optional: true]}], "hexpm", "419aa7a39bde11894c87a615c4ecaa52d8f107bbdd81d810465186f783245bf8"},
+  "ex_marcel": {:hex, :ex_marcel, "0.1.0", "61116a255ed51e8d9ec65cb0018442bf37cadb2228d3bb90e3bbb6d3d11dcd34", [:mix], [], "hexpm", "48dfc497435a9c52c0e90c1e07d8ce7316a095dcec0e04d182e8250e493b72fb"},
   "ex_ulid": {:hex, :ex_ulid, "0.1.0", "e6e717c57344f6e500d0190ccb4edc862b985a3680f15834af992ec065d4dcff", [:mix], [], "hexpm", "a2befd477aebc4639563de7e233e175cacf8a8f42c8f6778c88d60c13bf20860"},
   "ex_unit_notifier": {:hex, :ex_unit_notifier, "1.3.0", "1d82aa6d2fb44e6f0f219142661a46e13dcba833e150e1395190d2e0fb721990", [:mix], [], "hexpm", "55fffd6062e8d962fc44e8b06fa30a87dc7251ee2a69f520781a3bb29858c365"},
   "exdiff": {:hex, :exdiff, "0.1.5", "3e55bd840214508fd478d91fb07f1671d90d2f0d6f5266296e3b596e07d92305", [:mix], [], "hexpm", "b1ccef642edc28ed3acf1b08c8dbc6e42852d18dfe51b453529588e53c733eba"},