fix: devcontainers and docs

Author: praisetompane

.DS_Store

@@ -0,0 +1,6 @@
+{
+    "name": "sql",
+    "image": "postgres:latest",
+    "workspaceMount": "source=${localWorkspaceFolder},target=/sql,type=bind,consistency=delegated",
+    "workspaceFolder": "/sql"
+}

.devcontainer/devcontainer.json

@@ -2,7 +2,10 @@
 ![build status](https://github.com/praisetompane/sql/actions/workflows/sql.yaml/badge.svg) <br>
 
 ## Objectives
-  An in-depth study of SQL's implementation and ecosystem.
+- An in-depth study of:
+	- SQL's Interpreter.
+	- SQL's language design, implementation and ecosystem.
+
 
 ## Language details
 - [language specification](https://www.iso.org/standard/76583.html)