Refactor application structure and enhance logging

- Introduced a Configuration struct to manage application settings.
- Created a State struct to encapsulate application state and dependencies.
- Replaced log package with logrus for improved logging capabilities.
- Implemented graceful shutdown handling for the HTTP server.
- Added context management for background tasks.
- Updated database initialization to ensure tables are created.
- Refactored user management functions to use the new State struct.
- Enhanced error handling and logging throughout the application.
- Updated README to reflect changes in user addition process.

Dockerfile

@@ -1,22 +1,16 @@
 FROM golang:alpine AS builder
-
-RUN apk add --no-cache gcc musl-dev
-
 WORKDIR /build
 COPY go.mod go.sum ./
 RUN go mod download
 COPY . .
+RUN CGO_ENABLED=0 go build -trimpath -ldflags="-s -w" -o /out/ncore-stats .
 
-ENV CGO_ENABLED=1
-RUN go build -o ncore-stats .
 
-FROM alpine:latest
-RUN apk --no-cache add ca-certificates
-WORKDIR /app/
-COPY --from=builder /build/trackncore .
-COPY --from=builder /build/data .
-COPY --from=builder /build/index.html .
-COPY --from=builder /build/script.js .
-COPY --from=builder /build/style.css .
+FROM alpine:3
+RUN apk add --no-cache ca-certificates
+WORKDIR /app
+COPY --from=builder /out/ncore-stats .
+COPY index.html style.css script.js ./
 EXPOSE 3000
+
 CMD ["./ncore-stats"]