build: Fix dockerfile server job not copying in packages

.dockerignore

@@ -0,0 +1,2 @@
+server/data/
+server/Makefile

Dockerfile

@@ -4,9 +4,7 @@
 FROM golang:1.25-alpine AS server
 
 WORKDIR /server
-COPY server/*.go server/go.* ./
-COPY server/arr/*.go ./arr/
-COPY server/game/*.go ./game/
+COPY server/ ./
 
 # Required so we can build with cgo
 RUN apk update && apk add --no-cache musl-dev gcc build-base