feat: add mafoc kit (#53)

kits/mafoc/metadata.yaml

@@ -0,0 +1,15 @@
+title: Mafoc
+logo: https://captainhaskell.ee/mafoc/img/mafoc-logo.svg
+description: The Cardano Indexer Framework with many predefined ones included.
+repository: https://github.com/eyeinsky/mafoc/
+features:
+  - containers
+settings:
+  template: plutus
+  size: small
+author:
+  name: Captain Haskell
+  website: https://captainhaskell.ee/mafoc/
+social:
+  twitter: Mafoc_Cardano
+  discord: bgUE4csP

kits/mafoc/readme.md

@@ -0,0 +1,34 @@
+# Mafoc
+
+Mafoc is a chain indexer written in haskell.
+
+Though it's library to build new indexers with, it also has a [quite a
+few of them built
+in](https://captainhaskell.ee/mafoc/docs/category/indexers). Some of
+thes output JSON directly (`addressbalance` and `deposit` can be used
+to monitor activity on an address), while others write to sqlite
+database.
+
+Indexers are easiest run with docker, e.g:
+```
+docker run --rm -it markus77/mafoc deposit "$CARDANO_NODE_SOCKET_PATH" \
+    --address addr1.. \
+    --address addr1..
+```
+
+To build Mafoc locally, one would need to do it in nix (be sure to use
+[nix
+cache](https://github.com/input-output-hk/cardano-ledger#nix-cache)):
+```bash
+nix develop
+cabal build mafoc:exe:mafoc
+```
+
+
+
+## Environment
+
+Mafoc needs access to a Cardano Node, which you can run locally, or
+use the common instance provided by
+[Demeter.run](https://demeter.run), which also provides the socket
+path environment variable used above.