fix: aktualisiere Go-Version auf 1.25 und passe Dockerfile an, um das kompilierte Binary direkt zu kopieren

Dockerfile

@@ -1,33 +1,12 @@
-# Stage 1: Builder
-FROM golang:1.25.4-alpine AS builder
-
-WORKDIR /app
-
-# Copy go.mod and go.sum first to leverage Docker cache
-COPY go.mod .
-COPY go.sum .
-
-# Download dependencies
-RUN go mod download
-
-# Copy the rest of the application source code
-COPY . .
-
-# Build the application
-# CGO_ENABLED=0 is important for static linking, resulting in a smaller image
-# -o manage-servers specifies the output binary name
-RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o manage-servers .
-
-# Stage 2: Runner
 FROM alpine:latest
 
 WORKDIR /root/
 
 # Copy the compiled binary from the builder stage
-COPY --from=builder /app/manage-servers .
+COPY manage-servers .
 
 # Copy the index.html file for the web server
-COPY --from=builder /app/index.html .
+COPY index.html .
 
 # Copy the servers.json file
 # COPY servers.json .