docs: Adds instructions about dev override

chore: Applies docker naming convention to files

docker-compose.dev.yml

@@ -0,0 +1,13 @@
+services:
+  db:
+    volumes:
+        - ./mariadb:/var/lib/mysql:Z
+
+  web:
+    volumes:
+      - ./web/www/sunders:/var/www/html:Z
+
+  data_handler:
+    volumes:
+      - ./data_handler/utils:/opt:Z
+      - ./data_handler/data_init:/opt/init/init.sql:Z