feat: update Docker configuration and environment handling

- Added PostgreSQL service to docker-compose.yml with health checks and persistent storage.
- Updated bot service to use environment variable substitution for database connection string.
- Upgraded Go version in Dockerfile to 1.26.1-alpine.
- Modified config loading to ignore missing .env file for better compatibility with Docker.

.dockerignore

@@ -0,0 +1,7 @@
+.git
+.gitignore
+.env
+*.md
+Dockerfile
+docker-compose*.yml
+.dockerignore

Dockerfile

@@ -0,0 +1,21 @@
+# Build stage
+FROM golang:1.26.1-alpine AS builder
+
+WORKDIR /app
+
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY . .
+RUN CGO_ENABLED=0 GOOS=linux go build -o /velox-bot .
+
+# Run stage
+FROM alpine:3.19
+
+RUN apk add --no-cache ca-certificates tzdata
+
+WORKDIR /app
+
+COPY --from=builder /velox-bot .
+
+ENTRYPOINT ["./velox-bot"]

docker-compose.yml

@@ -19,5 +19,22 @@ services:
       timeout: 5s
       retries: 5
 
-volumes:
+  bot:
-  velox_pgdata:
+    build: .
+    container_name: velox-bot
+    restart: unless-stopped
+    env_file: .env
+    environment:
+      DB_HOST: ${DB_HOST:-postgres://velox:velox_pwd@db:5432/velox?sslmode=disable}
+      LAVALINK_HOST: ${LAVALINK_HOST:-ws://lavalink:2333}
+      LAVALINK_PASSWORD: ${LAVALINK_PASSWORD:-youshallnotpass}
+    depends_on:
+      db:
+        condition: service_healthy
+    networks:
+      - default
+      - lavalink
+
+networks:
+  lavalink:
+    external: true

internal/config/config.go

@@ -18,9 +18,8 @@ type Config struct {
 }
 
 func LoadConfig() (*Config, error) {
-	if err := godotenv.Load(); err != nil {
+	// Load .env if present (e.g. local dev). Ignore if missing (e.g. Docker injects env vars).
-		return nil, err
+	_ = godotenv.Load()
-	}
 
 	token := os.Getenv("BOT_TOKEN")
 	if token == "" {
@@ -33,9 +32,6 @@ func LoadConfig() (*Config, error) {
 	}
 
 	guildID := os.Getenv("GUILD_ID")
-	if guildID == "" {
-		return nil, fmt.Errorf("GUILD_ID is not set")
-	}
 
 	dbHost := os.Getenv("DB_HOST")
 	if dbHost == "" {