feat: Add deployment guide and update README for Coolify setup; include dotenv for environment variable management

tests/integration/mileage-engine-flow.test.ts

@@ -1,3 +1,5 @@
+import { GuildMember } from "discord.js";
+
 const mockClient = {
   query: jest.fn(),
   release: jest.fn(),
@@ -53,7 +55,7 @@ describe("MileageEngine flow", () => {
           }),
         },
       },
-    } as any;
+    } as unknown as GuildMember;
 
     const engine = new MileageEngine({
       databaseUrl: "postgres://test",

tests/integration/tour-schedule-flow.test.ts

@@ -1,4 +1,4 @@
-import { ChannelType } from "discord.js";
+import { ChannelType, Guild } from "discord.js";
 import { TourScheduleEngine } from "../../src/tour-schedule";
 
 describe("TourScheduleEngine flow", () => {
@@ -15,26 +15,24 @@ describe("TourScheduleEngine flow", () => {
         }),
       },
       channels: {
-        fetch: jest
-          .fn()
-          .mockImplementation(async (channelId: string) => {
-            if (channelId === "stage-1") {
-              return {
-                type: ChannelType.GuildStageVoice,
-              };
-            }
+        fetch: jest.fn().mockImplementation(async (channelId: string) => {
+          if (channelId === "stage-1") {
+            return {
+              type: ChannelType.GuildStageVoice,
+            };
+          }
 
-            if (channelId === "announce-1") {
-              return {
-                isSendable: () => true,
-                send,
-              };
-            }
+          if (channelId === "announce-1") {
+            return {
+              isSendable: () => true,
+              send,
+            };
+          }
 
-            return null;
-          }),
+          return null;
+        }),
       },
-    } as any;
+    } as unknown as Guild;
 
     const engine = new TourScheduleEngine({
       stageChannelId: "stage-1",