Initial commit: nimforum with BaraDB backend

- Replaced SQLite with BaraDB via TCP wire protocol
- Added baradb_client.nim and baradb_sqlite.nim adapter
- Renamed SQL keywords: status->usrStatus, key->sessionKey, like->postLike
- Added NOW() support for datetime defaults
- Switched Jester to asynchttpserver (-d:useStdLib) to avoid thread/GC issues
- Frontend built and favicon added

docker/docker-compose.yml

@@ -0,0 +1,12 @@
+version: "3.7"
+
+services:
+  forum:
+    build:
+      context: ../
+      dockerfile: ./docker/Dockerfile
+    volumes:
+      - "../:/app"
+    ports:
+      - "5000:5000"
+    entrypoint: "/app/docker/entrypoint.sh"