chore: fix codespace stuff

.devcontainer/Dockerfile

@@ -1,8 +1,7 @@
 ARG VARIANT=bullseye
-FROM --platform=linux/amd64 mcr.microsoft.com/devcontainers/base:0-${VARIANT}
+FROM --platform=linux/amd64 mcr.microsoft.com/devcontainers/typescript-node:0-${VARIANT}
 
 ENV BUN_INSTALL=/bun
 RUN mkdir -p /bun \
-    && curl -fsSL https://bun.sh/install | bash \
-    && chown -R vscode /bun
+    && curl -fsSL https://bun.sh/install | bash
 ENV PATH=${BUN_INSTALL}/bin:${PATH}

.devcontainer/devcontainer.json

@@ -2,14 +2,5 @@
   "name": "bun",
   "build": {
     "dockerfile": "Dockerfile"
-  },
-
-  "customizations": {
-    "vscode": {
-      "settings": {},
-      "extensions": []
-    }
-  },
-
-  "remoteUser": "vscode"
+  }
 }

.env.example

@@ -1,2 +0,0 @@
-SLACK_APP_TOKEN=xapp-
-SLACK_BOT_TOKEN=xoxb-

src/index.ts

@@ -1,7 +1,4 @@
 import { App } from "@slack/bolt";
-import * as chrono from "chrono-node";
-import Keyv from "keyv";
-import KeyvSqlite from "@keyv/sqlite";
 
 const app = new App({
   token: process.env.SLACK_BOT_TOKEN,