Add support for discord chat bot to announce when images are set, with instructions on configuring for dev

app/api/src/lib/discord.ts

@@ -0,0 +1,24 @@
+import {Client, Intents} from "discord.js"
+
+const client = new Client({ intents: [Intents.FLAGS.GUILDS, Intents.FLAGS.GUILD_MESSAGES]})
+
+export async function sendChat(text: string) {
+  if (!client.isReady()) {
+    console.error(`Discord: client is not ready to send message ("${text}")`);
+  } else {
+    const channel = await client.channels.fetch(process.env.DISCORD_CHANNEL_ID);
+    channel.send(text);
+  }
+}
+
+client.on("ready", async () => {
+  console.log(`Discord: logged in as ${client.user.tag}`)
+  await sendChat("started");
+})
+
+if (!process.env.DISCORD_TOKEN || !process.env.DISCORD_CHANNEL_ID) {
+  console.warn("Discord bot not configured - please set process.env.DISCORD_TOKEN and process.env.DISCORD_CHANNEL_ID to send discord chats");
+} else {
+  console.log(`Discord: logging in (token ${process.env.DISCORD_TOKEN})`);
+  client.login(process.env.DISCORD_TOKEN);
+}