feat: add total player count and total playtime logic

- Implemented TotalPlayerCountLogic to retrieve the total number of unique players within a specified time range.
- Implemented TotalPlayTimeLogic to calculate the total playtime of players within a specified time range.
- Created ServiceContext to manage database connections and initialize necessary tables.
- Added types for total player count and total playtime requests and responses.
- Set up the main server file to start the application with the necessary configurations.
- Updated go.mod and go.sum for new dependencies.

Dockerfile

@@ -5,19 +5,19 @@ FROM golang:1.24.4-alpine AS builder
 RUN apk add --no-cache git
 
 # Set working directory
-WORKDIR /app
+WORKDIR /build
 
-# Copy go mod files from src directory
-COPY src/go.mod src/go.sum ./
+# Copy go mod files from root directory
+COPY go.mod go.sum ./
 
 # Download dependencies
 RUN go mod download
 
-# Copy source code from src directory
-COPY src/ .
+# Copy the entire app directory to maintain the module structure
+COPY app/ ./app/
 
-# Build the application
-RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o serverstatistics serverstatistics.go
+# Build the application from the app directory
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o serverstatistics ./app/serverstatistics.go
 
 # Production stage
 FROM alpine:latest
@@ -28,13 +28,13 @@ RUN apk --no-cache add ca-certificates
 WORKDIR /root/
 
 # Copy binary from builder
-COPY --from=builder /app/serverstatistics .
+COPY --from=builder /build/serverstatistics .
 
 # Copy config file
-COPY --from=builder /app/etc/serverstatistics.yaml ./etc/
+COPY app/etc/serverstatistics.yaml ./etc/
 
 # Expose port
 EXPOSE 8888
 
 # Run the application
-CMD ["./serverstatistics", "-f", "etc/serverstatistics.yaml"]
+CMD ["./serverstatistics", "-f", "etc/serverstatistics.yaml"]